| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| The A B C of socialism: (including the A B C of economics) | | 1915 | M. O. Teck, I. G. Savoy | |  | |  | | 
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| Abraham Lincoln: A Real American | | 1936 | Daniel W. (Daniel Webster) Hoan |  | |  | | |   
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| After the new deal, what? | | 1936 | Norman Thomas | | | | | |
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| Alleged socialism of the church fathers | | 1913 | John A. (John Augustine) Ryan | | | | | |
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| America at the crossroads | | 1934 | David Paul Berenberg | | | | | |
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| America goes socialistic | | 1933 | Henry Savage | | | | | |
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| American communism: a critical analysis of its origin, development and programs | | 1927 | James Oneal | | | | | |
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| American democracy versus Prussian Marxism: a study in the nature and results of purposive or beneficial government | | 1920 | Clarence F. (Clarence Frank) Birdseye | | | | | |
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| The American jitters: a year of the slump | | 1932 | Edmund Wilson | | | | | |
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| American liberty enlightening the world: moral basis of a league for peace | | 1920 | Henry Churchill Semple | | | | | |
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| American socialism: its aims and practical program | | 1937 | Harry W. (Harry Wellington) Laidler | | | | | |
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| American socialism of the present day | | 1911 | Jessie Wallace Hughan, John Spargo | | | | | |
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| The American Socialists and the War: A Documentary History of the Attitude of the Socialist Party Toward War and Militarism Since the Outbreak of the Great War | | 1917 | Alexander Trachtenberg | | | | | |
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| American syndicalism: the I. W. W | | 1913 | John Graham Brooks | | | | | |
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| Americanism and social democracy | | 1918 | John Spargo | | | | | |
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| Americanized socialism: a Yankee view of capitalism | | 1918 | James MacKaye | | | | | |
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| And I saw a new earth: affliction & remedy | | 1934 | Juste, Harry Hector Wood | | | | | |
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| An answer to chaos: the coming economic life | | 1933 | Oliver Warren Johnson | | | | | |
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| Anti-socialism | | 1915 | John W. Batdorf | | | | | |
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| Applied socialism: a study of the application of socialistic principles to the state | | 1912 | John Spargo | | | | | |
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| Arbejderforhold og socialreform i det nittende aarhundrede | | 1920 | Axel Nicolaj Holck |  | | | | |
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| Are there classes in America? | | 1914 | Ralph Korngold | | | | | |
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| The art of being ruled | | 1926 | Wyndham Lewis | | | | | |
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| The art of being ruled | | 1926 | Wyndham Lewis | | | | | |
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| As I see it | | 1932 | Norman Thomas | | | | | |
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| Au berceau du socialisme français | | 1932 | Paul Lombard |  | | | | |
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| Au delà du capitalisme et du socialisme | | 1932 | Stefan Priacel, Arturo Labriola | | | | | |
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| August Bebel: Geschichte einer politischen Vernunft | | 1932 | Max Hochdorf |  | | | | |
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| The autobiography of a working woman | | 1912 | Adelheid Popp, E. C. Harvey, F. C. Harvey | | | | | |
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| Back to barbarism | | 1923 | Richard Merrill Whitney | | | | | |
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| Back to slavery | | 1908 | ed George Wilson Teitsworth | | | | | |
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| Bare hands and stone walls: some recollections of a side-line reformer | | 1933 | Charles Edward Russell | | | | | |
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| Barnhill-Tichenor debate on socialism | | 1914 | Henry Mulford Tichenor, John Basil Barnhill | | | | | |
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| Basic principles of scientific socialism | | 1925 | A. S. Sachs, A. Ś. Zaḳs | | | | | |
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| The beginnings of Marxian socialism in France | | 1933 | Samuel Bernstein | | | | | |
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| Bolshevik terror against socialists: documents and facts | | 1925 | | | | | | |
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| Bolshevism, fascism and the liberal-democratic state | | 1934 | Maurice Parmelee | | | | | |
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| Bolshevism : its cure | | 1919 | David Goldstein, Martha Moore Avery | | | | | |
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| Bourgeois socialism: its rise and collapse in America | | 1951 | Arnold Petersen | | | | | |
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| Bread or lead: production for use or production for destruction | | 1940 | Oscar Ameringer | | | | | |
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| Breve refutación de los falsos principios económicos de la Internacional | | 1874 | José Menendez de la Pola |  | | | | |
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| British socialism: an examination of its doctrines, policy, aims and practical proposals | | 1908 | J. Ellis Barker | | | | | |
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| The burden of poverty, what to do | | 1912 | Charles F. (Charles Fletcher) Dole | | | | | |
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| Capital and labor | | 1907 | W. S. (William Shuler) Harris, Paul Krafft | | | | | |
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| Capital: the Communist manifesto and other writings | | 1932 | Max Eastman, Karl Marx, Vladimir Il’ich Lenin | | | | | |
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| Capitalism's individual ownership | | 1929 | George Lewis Bolen | | | | | |
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| Capitalism versus socialism and communism: a refutation of socialism and communism | | 1939 | Leroy Adelbert Hollenbeck | | | | | |
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| Capitalism--or communism?: A study in the fundamentals of the two clashing politico-economic ideologies | | 1950 | Elmer E. Ledbetter | | | | | |
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| A capitalist's view of socialism | | 1916 | Benjamin Paul Blood | | | | | |
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| The case against David Dubinsky | | 1946 | William W. (William Wolf) Weinstone | | | | | |
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| The case for capitalism | | 1920 | Hartley Withers | | | | | |
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| The Catholic church and bolshevism: seven lectures | | 1930 | John A. McClorey | | | | | |
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| Challenge to the New Deal | | 1934 | John Dewey, Selden Rodman, Alfred M. (Alfred Mitchell) Bingham | | | | | |
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| Changes in the theory and tactics of the (German) social-democracy | | 1908 | Winfield Romeo Gaylord, Paul Kampffmeyer | | | | | |
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| Chapters from My Diary | | 1918 | Leon Trotsky | | | | | |
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| The characteristics and the religion of modern socialism | | 1908 | John J. (John Joseph) Ming | | | | | |
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| China, Russia, USA: State-Capitalism and Marx's Humanism, or, Philosophy and Revolution | | 1967 | Raya Dunayevskaya | | | | | |
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| The choice before us: mankind at the crossroads | | 1934 | Norman Thomas | | | | | |
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| Christianity and the social order | | 1907 | R. J. (Reginald John) Campbell | | | | | |
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| The church and social problems | | 1912 | Joseph Casper Husslein | | | | | |
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| The church and socialism and other essays | | 1919 | John A. (John Augustine) Ryan | | | | | |
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| The Church of England and social reform since 1854 | | 1930 | Donald O. (Donald Owen) Wagner | | | | | |
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| The civil war in Austria: a first-hand account from eye-witnesses and participants | | 1934 | David Paul Berenberg, Julius Deutsch | | | | | |
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| The coming of a new party | | 1932 | John Dewey, Paul H. (Paul Howard) Douglas | | | | | |
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| The coming of the peasant | | 1934 | Clark Dwight Spivey | | | | | |
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| Comment se réalisera le socialisme | | 1919 | Lucien Deslinières | | | | | |
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| The common sense of socialism: a series of letters addressed to Jonathan Edwards, of Pittsburg | | 1908 | John Spargo | | | | | |
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| Communism, socialism and the church | | 1913 | Oscar Ameringer | | | | | |
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| Communismus und socialismus | | 1878 | Carl Ferdinand Wilhelm Walther, C. F. W. (Carl Ferdinand Wilhelm) Walther | | | | | |
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| The Communist Party at the crossroads : toward Democratic Socialism or back to Stalinism / by H. W. Benson. | | 1957 | | | | | | |
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| The conquest of power: liberalism, anarchism, syndicalism, socialism, fascism, and communism | | 1937 | Albert Weisbord | | | | | |
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| Constitution of the United States: Founding of the Bourgeois Republic | | 1959 | Arnold Petersen | | | | | |
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| Constructive socialism | | 1913 | George Thomas Millar | | | | | |
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| Contemporary social movements | | 1930 | Jerome Davis | | | | | |
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| Control from the top | | 1933 | Francis Neilson | | | | | |
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| Craft unionism verus industrial unionism | | 1922 | Frank Budgen, L. (Leonard) Cotton | | | | | |
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| Crises in European history | | 1916 | Arnold Petersen, Gustav Bang | | | | | |
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| The crisis of the middle class | | 1935 | Lewis Corey | | | | | |
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| The cross of gold and the crown of thorns | | 1912 | J. Alexander Freeland | | | | | |
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| Darwinismo e socialismo moderno | | 1914 | Fanny Dalmazzo, Gino Arias, Frederick Webb Headly |  | | | | |
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| Das neue Wien. | | 1930 | Robert Danneberg |  | | | | |
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| De la propriété capitaliste à la propriété humaine | | 1936 | Emmanuel Mounier | | | | | |
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| A dead issue and the live one | | 1913 | Benjamin Franklin Van Meter | | | | | |
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| A defense of liberty | | 1921 | Viscount Oliver Sylvain Baliol Brett Esher | | | | | |
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| Democratic socialism: a new appraisal | | 1953 | Norman Thomas | | | | | |
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| Demokratie und Weltkrieg | 1. bis 4. Tausend. | 1916 | Margarethe Langfeldt, Gustaf Frederik Steffer | | | | | |
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| Der briefweschael zwischen Friedrich Engels und Karl Marx, 1844 bis 1883 | | 1913 | Eduard Bernstein, Friedrich Engels, Karl Marx | | | | | |
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| Der Kampf um die Volksordnung | | 1933 | Rudolf Craemer | | | | | |
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| Der Katheder-Sozialismus | | 1873 | Heinrich Bernhard Oppenheim | | | | | |
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| Der Marxismus und das deutsche heer im weltkriege | | 1925 | Erich Otto Volkmann | | | | | |
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| Der revolutionär Kurt Eisner aus persönlichen erlebnissen | | 1929 | Felix Fechenbach | | | | | |
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| Der Soziale Katholizismus in Deutschland bis zum Tode Kettelers | | 1914 | Albert Franz | | | | | |
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| Der soziale katholizismus in England | | 1914 | Karl. Waninger | | | | | |
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| Der Sozialismus in der Karikatur von Marx bis MacDonald: ein Stück Kulturgeschichte | | 1924 | Friedrich Wendel | | | | | |
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| The devil and socialism | | 1914 | William Franklin Lemmons | | | | | |
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| Die arbeiterschaft im neuen Deutschland | | 1915 | Carl Legien, Friedrich Thimme | | | | | |
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| Die befreiung der menschheit | | 1921 | Paul. Adler, Ignaz Ježower | | | | | |
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| Die geistige Gestalt des Marxistischen Arbeiters und die Arbeiterbildungsfrage | | 1926 | Gertrud Hermes | | | | | |
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| Die Intellektuellen und der Sozialismus: 1. und 2. Tausend | | 1926 | Hendrik de Man | | | | | |
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| Die maschinenutopie: das übereinstimmungsmoment der bürgerlichen und sozialistischen ökonomie | | 1927 | Adolf Caspary | | | | | |
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| Die proletarische Frau und ihre Erziehungsaufgabe | | 1929 | Henny Schumacher | | | | | |
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| Die socialistische idee | | 1933 | Hendrik de Man | | | | | |
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| Die wirtschaft als gesamtprozess und die sozialisierung, populärwissenschaftlich dargestellt nach Karl Marx' system | | 1925 | Karl Renner | | | | | |
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| Die wirtschaftstheoretischen grundlagen des deutschen sozialismus | | 1934 | Kurt. Fiedler | | | | | |
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| The dynamics of war and revolution | | 1940 | Lawrence Dennis | | | | | |
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| The early days of Christian socialism in America | | 1937 | James Dombrowski | | | | | |
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| The early English socialists | | 1933 | H. L. (Hugh Lancelot) Beales | | | | | |
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| An East Side epic: the life and work of Meyer London | | 1930 | Hillel Rogoff, Harry Rogofl | | | | | |
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| Economics for the power age: a statement of first principles | | 1952 | Scott Nearing | | | | | |
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| The economics of socialism | | 1921 | Henry Mayers Hyndman | | | | | |
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| Education and the social conflict | | 1936 | Howard David Langford | | | | | |
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| Edward Bellamy speaks again!: Articles--public addresses--letters | | 1937 | Edward Bellamy | | | | | |
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| Einführung in die Nationalökonomie | | 1925 | Rosa Luxemburg, Paul Levi | | | | | |
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| Elements of socialism | | 1912 | George Byron Louis Arner, John Spargo | | | | | |
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| En gard! | | 1911 | Jules Guesde | | | | | |
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| Encyclopédie socialiste | | 1912 | | | | | | |
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| Essai sur la misère humaine | | 1934 | Brice Parain | | | | | |
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| An essay on catholicism, authority and order considered in their fundamental principles | | 1925 | Don Juan Donoso Cortes, Madeleine Vinton Dahlgren | | | | | |
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| The essentials of Marx: the communist manifesto | | 1926 | Friedrich Engels, Karl Marx, Frederick Engels | | | | | |
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| The essentials of socialism | | 1912 | Ira B. (Ira Brown) Cross | | | | | |
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| Europe, Russia and the future | | 1942 | G. D. H. (George Douglas Howard) Cole | | | | | |
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| Evolution of society from primitive savagery to the industrial republic | | 1927 | Worden Horst Mills, Worden Horst Mills | | | | | |
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| An explanation and criticism of the doctrines and proposals of scientific socialim | | 1920 | James Edward Le Rossignol | | | | | |
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| Exploiteurs et salariés | | 1895 | Gustave Théry | | | | | |
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| Facing reality | | 1958 | C. L. R. (Cyril Lionel Robert) James, Grace Lee Boggs, Cornelius Castoriadis | | | | | |
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| Fact and fraud: a lecture making socialism plain | | 1913 | Herr Glessner Creel | | | | | |
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| Factory work as it is and might be: a series of four papers | | 1922 | William Morris | | | | | |
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| The facts of socialism | | 1913 | Jessie Wallace Hughan | | | | | |
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| Facts: or, What a socialist is and what he is not | | 1912 | Robert Westfall | | | | | |
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| The failure of regulation | | 1914 | Daniel W. (Daniel Webster) Hoan | | | | | |
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| Farewell to poverty | | 1935 | Maurice Parmelee | | | | | |
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| The fate of the French non-communist left | | 1955 | E. Drexel (Edwin Drexel) Godfrey | | | | | |
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| The fight for socialism: the principles and program of the Workers Party | | 1946 | Max Shachtman | | | | | |
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| The first workers' government: or, New times for Henry Dubb | | 1934 | Sir Stafford Cripps, G. R. Mitchison | | | | | |
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| Force et misère du socialisme | | 1932 | Georges Viance | | | | | |
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| Forgings of the new | | 1907 | Franklin Harcourt Wentworth | | | | | |
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| The foundation for the new psychology: an explanation of the existing class conflict between capital and labor and method of eliminating it | | 1915 | Ben. Meyerson | | | | | |
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| The foundation of the Communist International | | 1934 | Vladimir Il’ich Lenin | | | | | |
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| Fourier | | 1937 | René Maublanc, F. (Félix) Armand | | | | | |
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| Freud and Marx: a dialectical study | | 1937 | John Strachey, Reuben Osborn | | | | | |
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| From Marx to Lenin | | 1921 | Morris Hillquit | | | | | |
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| From the bottom up: the life story of Alexander Irvine | | 1910 | Alexander Irvine | | | | | |
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| The fundamentals of peace and war | | 1953 | Clair Starrett Linton | | | | | |
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| Gandhism versus socialism | | 1932 | Richard Bartlett Gregg | | | | | |
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| The generic evil: a study of the process of evolution of society, from a remote past to a distant future | | 1933 | Mordecai, Mordecai Iethoc Fruchs | | | | | |
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| Geschichte der sozialen Frage und des Sozialismus in der antiken Welt | | 1925 | Robert von Pöhlmann, Friedrich Oertel | | | | | |
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| Geschichte des Sozialismus in England | | 1913 | Max Beer | | | | | |
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| Geschlecht und Gesellschaft | | 1928 | active1928-1931. Helmut Wagner | | | | | |
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| Glimpses of a new horizon: an outline of a new economic and social order | | 1951 | Pietro Campo | | | | | |
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| The golden rule republic no utopia | | 1908 | William Henry Randall | | | | | |
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| The great delusion: some facts about government in business | | 1933 | Ernest Greenwood, George F. Oxley | | | | | |
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| Greed's grip broken: or, The right to live | | 1928 | Joseph Weber Savage | | | | | |
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| Grundlagen der neuen Gesellschaft | | 1929 | Paul Ernst | | | | | |
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| A guilty world | | 1912 | Erik Christenson | | | | | |
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| Hacia la segunda revolución : el fracaso de la república y la insurrección de octubre. | | 1935 | Joaquín Maurín | | | | | |
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| Hallo: Europäer! | | 1932 | báró. Béla Malcomes | | | | | |
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| Hell bent for election | | 1935 | James P. (James Paul) Warburg | | | | | |
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| Herr Eugen Dühring's revolution in science <anti-Dühring> | | 1935 | Friedrich Engels | | | | | |
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| An historical approach to the world problems of today | | 1934 | Frederick Stanley Rodkey | | | | | |
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| Historical materialism: a system of sociology | | 1925 | Nikolaĭ Ivanovich Bukharin | | | | | |
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| A history of socialist thought | | 1927 | S. Eldridge, Harry W. (Harry Wellington) Laidler | | | | | |
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| A history of socialist thought | | 1933 | Seba Eldridge, Harry W. (Harry Wellington) Laidler | | | | | |
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| History of the Communist Party of the United States | | 1952 | William Z. Foster | | | | | |
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| Horace Greeley and other pioneers of American socialism | | 1915 | Charles Sotheran, W. J. Ghent, Mrs Alice Hyneman Sotheran | | | |  | |
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| Houses built upon the sand: Christian science examined, socialism reviewed, pentecostal movement tested | | 1921 | Fred W. Bostrom | | | | | |
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| How can the Socialist Party best serve socialism? / by Norman Thomas. | | 1949 | | | | | | |
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| How red is America? | | 1927 | Will Irwin | | | | | |
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| I, governor of California, and how I ended poverty: a true story of the future | | 1933 | Upton Sinclair | | | | | |
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| Import and outlook of socialism | | 1910 | Newton M. Mann | | | | | |
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| In place of profit: social incentives in the Soviet Union | | 1933 | Harry Frederick Ward | | | | | |
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| Incentives under capitalism and socialism | | 1933 | Harry W. (Harry Wellington) Laidler | | | | | |
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| Individualism and socialism: an ethical survey of economic and political forces | | 1933 | Kirby Page | | | | | |
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| Industrial socialism | | 1911 | William D. Haywood, Big Bill Haywood, Frank Bohn | | | | | |
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| The inhumanity of socialism: The case against socialism & A critique of socialism. Two papers, the first read before the League of the republic at the University of California, December the fifth, nineteen hundred and thirteen, and the second read before the Ruskin club of Oakland, California, some years earlier | | 1913 | Edward Francis Adams | | | | | |
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| Insurgent America; revolt of the middle-classes | | 1934 | Alfred M. (Alfred Mitchell) Bingham | | | | | |
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| Intellectometer (mental speedometer) and a plea for a better system | | 1912 | William Christopher Langhorst | | | | | |
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| The intelligent woman's guide to socialism and capitalism | | 1928 | Bernard Shaw | | | | | |
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| Interesting sketches | | 1911 | Gilbert H. Poor | | | | | |
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| The international situation and the Soviet Union | | 1935 | Vyacheslav Mikhaylovich Molotov | | | | | |
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| International socialism and the world war | | 1935 | Merle Fainsod | | | | | |
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| Introduction to dialectical materialism: the Marxist worldview | | 1936 | William T. Stone, August Thalheimer, George Simpson | | | | | |
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| An introduction to sociology | | 1913 | Arthur M. (Arthur Morrow) Lewis | | | | | |
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| Inviting war to America | | 1916 | Allan L. (Allan Louis) Benson | | | | | |
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| Is the world going red?: Is capitalism doomed? Will socialism prevail? Is communism or fascism just around the corner? When will the working classes get justice and security? | | 1935 | Alonzo Lafayette Baker | | | | | |
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| Jean Jaurès: a story of patriotism in the French socialist movement | | 1935 | Harold Richard Weinstein | | | | | |
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| Kant und der Marxismus: gesammelte Aufsätze zur Erkenntniskritik und Theorie des Sozialen | | 1925 | Max Adler | | | | | |
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| Kapitalismus und sozialismus | | 1931 | George N. (George Nikolaus) Halm, Ludwig Pohle | | | | | |
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| Karl Kautsky: skizze zur geschichte der geistigen und politischen entwicklung der deutschen arbeiterklasse, ihrem lehrmeister Kautsky zum fünfundsiebzigsten geburtstag | | 1929 | Karl Renner | | | | | |
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| Karl Marx | | 1920 | Achille Loria, Eden, Eden Paul | | | | | |
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| Karl Marx: an essay | | 1933 | Harold Joseph Laski, Friedrich Engels, Karl Marx | | | | | |
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| Ketteler et la question ouvrière, avec une introduction historique sur le mouvement social catholique | | 1896 | Eugène de. Girard |  | | | | |
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| Kommunistinen Manifesti | | 1914 | Friedrich Engels, Karl Marx | | | | | |
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| Komunisticni Manifest | | 1908 | Friedrich Engels, Karl Marx | | | | | |
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| Konservativer sozialismus | | 1932 | Hermann Curth, Wichard Georg von Moellendorff | | | | | |
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| "Kumrids," a discussion of scientific socialism | | 1912 | Charley Edward Guthrie | | | | | |
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| L'état, ce néant | | 1937 | Édouard Julia | | | | | |
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| L'évolution actuelle du monde: illusions et réalités | | 1927 | Gustave Le Bon | | | | | |
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| La crise sociale de 1848: les origines et la révolution de février | | 1920 | | | | | | |
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| La cuestión internacional y el Partido socialista | | 1917 | Will Grefe, E. Phillips Oppenheim |  | | | | |
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| La décadence socialiste | | 1926 | E.-H. Massa | | | | | |
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| La legislacion social después de la guerra : la crisis del socialismo y el maximalismo : conferencias inaugurales del Dr. Carols Saavedra Lamas ... | | 1922 | Carlos Saavedra Lamas | | | | | |
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| La lucha de clases a través de la historia de México. | | 1934 | Rafael Ramos Pedrueza |  | | | | |
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| La lucha de clases a través de la historia de México. | | 1936 | Rafael Ramos Pedrueza | | | | | |
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| La marche au socialisme | | 1920 | Edgard Milhaud | | | | | |
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| La question sociale en Espagne | | 1910 | Angel Marvaud | | | | | |
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| La révolution en marche | | 1925 | comte de Edmond Fels | | | | | |
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| La reconstrucción socialista de la sociedad (el voto industrial) | | 1922 | A. J. Taylor, Daniel De Leon | | | | | |
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| Labor and farmer parties in the United States, 1828-1928 | | 1928 | Nathan Fine, Nathan Fine | | | | | |
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| Labor and internationalism | | 1929 | Lewis Levitzki Lorwin | | | | | |
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| The labor movement in America | | 1905 | Richard Theodore Ely | | | | | |
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| The labor movement in France; a study in revolutionary syndicalism | | 1912 | Lewis Levitzki Lorwin | | | | | |
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| The labor problem and the social Catholic movement in France: a study in the history of social politics | | 1921 | Parker Thomas Moon | | | | | |
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| Labor's challenge to the social order: democracy its own critic and educator | | 1920 | John Graham Brooks | | | | | |
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| The labour movement and the church | | 1922 | John M.-C. (John Moran Cochran) Wilson | | | | | |
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| The Labour Unrest | | 1912 | H. G. (Herbert George) Wells | | | | | |
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| Landmarks of scientific socialism: "anti-Duehring" | | 1907 | Austin Lewis, Friedrich Engels | | | | | |
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| The larger aspects of socialism | | 1913 | William English Walling | | | | | |
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| The larger socialism | | 1921 | Bertram Benedict | | | | | |
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| The law of social revolution | | 1926 | Scott Nearing | | | | | |
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| Le déclin de la société bourgeoise | | 1923 | Paul Louis | | | | | |
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| Le franc-travail opposé au franc-or | | 1936 | André Suarnet | | | | | |
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| Le socialisme en France depuis 1904 | | 1934 | Alexandre Zévaès | | | | | |
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| Le socialisme et la société | | 1922 | Louis N. Le Roux, James Ramsay MacDonald | | | | | |
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| Le socialisme suivant les peuples | | 1920 | Edmond Laskine | | | | | |
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| Leaves of life: a story of twenty years of socialist agitation | | 1912 | J. A. (Julius Augustus) Wayland | | | | | |
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| Left wing unionism: a study of radical policies and tactics | | 1926 | David Joseph Saposs | | | | | |
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| The legacy of war - peace | | 1927 | B. A. (Boris Aleksandrovich) Bakhmetev | | | | | |
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| Lenin | | 1933 | R. Palme (Rajani Palme) Dutt | | | | | |
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| "Les grands textes du marxisme" sur la littérature et l'art ... | | 1936 | Jean Fréville, Friedrich Engels, Karl Marx | | | | | |
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| A letter to American workingmen: from the Socialist Soviet Republic of Russia | | 1918 | Vladimir Il'ich Lenin, Vladimir Il’ich Lenin | | | | | |
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| Letters from prison: socialism a spiritual sunrise | | 1915 | Bouck White | | | | | |
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| The limits of socialism | | 1920 | O. Fred (Oswald Fred) Boucke | | | | | |
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| [Literature on social democrat movement, proletarian movemements, socialist and revolutionary movements in Russia and Europe]. | | | |  | | | | |
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| Loose leaves from a busy life | | 1934 | Morris Hillquit | | | | | |
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| Lyric pioneers of modern Germany: studies in German social poetry | | 1928 | Solomon Liptzin | | | | | |
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| The making of to-morrow: the art of industrial right living | | 1920 | Hayes Robbins | | | | | |
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| Manifesto of the Communist party | | 1933 | Friedrich Engels, Karl Marx, Samuel Moore | | | | | |
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| Manifesto of the Communist Party | | 1908 | Friedrich Engels, Karl Marx, Samuel Moore | | | | | |
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| Marxian economics: a popular introduction to the three volumes of Marx's "Capital." | | 1907 | Ernest Untermann | | | | | |
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| Marxian socialism and religion: a study of the relation of the Marxian theories to the fundamental principles of religion | | 1915 | John Spargo | | | | | |
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| Marxism; an historical and critical study | | 1961 | George Lichtheim | | | | | |
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| Marxism versus socialism | | 1913 | Vladimir G. (Vladimir Gregorievitch) Simkhovitch | | | | | |
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| Masses vs. classes: the people's right to economic security | | 1932 | Benjamin Allen Mason, Rolf Hoffmann | | | | | |
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| The meaning of socialism | | 1920 | J. R. Macdonald, J. Bruce (John Bruce) Glasier, J. A. Hobson | | | | | |
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| The mechanics of socialism | | 1915 | James MacKaye | | | | | |
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| The message of the Comforter | | 1926 | Alpheus Josephus Williamson | | | | | |
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| Militant and triumphant socialism | | 1913 | Charles H. (Charles Henry) Vail | | | | | |
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| The militant proletariat | | 1911 | Austin Lewis | | | | | |
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| Monarchical socialism in Germany | | 1913 | Elmer Roberts | | | | | |
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| Moneyless government: or, Why and why not? | | 1934 | Henry Crecelius McCowen | | | | | |
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Public Domain Books