| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| American humanism and the new age | | 1948 | Louis Joseph Alexandre Mercier | |  | |  | | 
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| Atheism in the English renaissance | | 1932 | George T. Buckley | | | |  | |
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| Autour de l'humanisme, d'Érasme à Pascal | | 1937 | Henri Bremond |  | | | | |
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| Belief in man | | 1932 | Philip S. Richards | | | | | |
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| Beyond doubt | | 1946 | Kenneth L. (Kenneth Leo) Patton | | | | | |
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| Brain storms of humanism | | 1932 | Thomas Carlyle Lattimer, Joseph Ketchum 186-?- Jones | | | | | |
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| The case for tragedy: being a challenge to those who deny the possibility of a tragic spirit in the modern world | | 1932 | Markham Harris | | | | | |
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| The Cause and Cure of Infidelity: Including a Notice of the Author's Unbelief and the Means of His Rescue | | 1841 | David Nelson | | | | | |
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| The challenge of humanism | | 1933 | Louis Joseph Alexandre Mercier | | | | | |
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| The Christian criticism of life | | 1941 | Lynn Harold Hough | | | | | |
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| The civilized mind | | 1937 | Lynn Harold Hough | | | | | |   
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| Creative sceptics: in defense of the liberal temper | | 1934 | Thomas Vernor Smith | | | | | |
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| The critique of humanism | | 1930 | Clinton Hartley Grattan, Paul Klapper, William E. Grady | | | | | |
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| A debate between W. L. Oliphant ... and Charles Smith: held in the church of Christ, Shawnee, Oklahoma, August 15 and 16, 1929 | | 1929 | Charles Smith, Miss Blanche Burton, W. L. (William Landon) Oliphant | | | | | |
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| Dialogue between a priest and a dying man | | 1927 | Samuel Putnam, Marquis, marquis de Sade | | | | | |
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| The dilemma of the liberated: an interpretation of twentieth century humanism | | 1930 | Gorham Bert Munson | | | | | |
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| Doubters and their doubts | | 1916 | Charles David Darling | | | | | |
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| Du régime temporel et de la liberté | | 1933 | Jacques Maritain | | | | | |
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| Erasmus and the humanists | | 1930 | Desiderius Erasmus, Albert Hyma, B. B. Sfehmitt | | | | | |
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| The first century of Italian humanism | | 1928 | Ferdinand Schevill | | | | | |
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| God and the cosmos: a critical analysis of atheism | | 1932 | Theodore Graebner | | | | | |
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| God is: an antedote [sic] for the poisonous propaganda of "The American Association for the Advancement of Atheism, Inc." | | 1929 | George A. (George Adam) Klingman | | | | | |
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| Humanism | | 1926 | Curtis W. (Curtis Williford) Reese | | | | | |
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| Humanism, a new religion | | 1930 | Charles Francis Potter, Clara Cook Potter | | | | | |
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| Humanism and America | | 1930 | Norman Foerster, H. H. Clark, Irving Babbitt | | | |  | |
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| Humanism and tyranny: studies in the Italian trecento | | 1925 | Ephraim Emerton, Coluccio Salutati, Gil Alvarez Carrillo de Albornoz | | | | | |
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| Humanism as a way of life | | 1930 | J. George (Justus George) Frederick | | | | | |
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| Humanism states its case: by J. A. C. Fagginger Auer ... the Lowell institute lectures, delivered in King's chapel, Boston, Massachusetts, during February and March, 1932 | | 1933 | J. A. C. Fagginger (Johannes Abraham Christoffel Fagginger) Auer | | | | | |
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| Humanism versus theism | | 1951 | Julian Norris Hartt, J. A. C. Fagginger (Johannes Abraham Christoffel Fagginger) Auer | | | | | |
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| Humanismus und renaissance in den deutschen städten und an den universitäten | | 1935 | Hans Rupprich |  | | | | |
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| Humanist sermons | | 1928 | Curtis W. (Curtis Williford) Reese | | | | | |
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| The humanity of man | | 1956 | Ralph Barton Perry | | | | | |
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| Humanizing religion | | 1933 | Charles Francis Potter | | | | | |
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| The independent mind: essays of a humanist philosopher | | 1951 | Corliss Lamont | | | | | |
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| The interpretation of Renaissance humanism | | 1959 | William J. (William James) Bouwsma | | | | | |
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| L'homme est-il humain? | | 1936 | Ramon Fernandez | | | | | |
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| L'humanisme et l'idée de patrie | | 1936 | Waldemar George | | | | | |
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| ... L' humanisme juif | | 1931 | Hans Kohn | | | | | |
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| La religion de l'athée | | 1922 | Jules Sageret | | | | | |
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| La renaissance | | 1933 | Georges Le Bidois, Eugenè. Langevin, Raoul Morçay | | | | | |
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| Le mouvement humaniste en Amérique et les courants de pensée similaires en France | | 1934 | Christian Richard | | | | | |
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| The literatures of Greece and Israel in the renaissance | | 1925 | Francis B. (Francis Brigham) Denio | | | | | |
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| Man in the new humanism | | 1934 | | | | | | |
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| Man's new image of man: an interpretation of the development of American philosophy from puritanism to world humanism | | 1961 | Oliver Leslie Reiser | | | | | |
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| Medieval humanism | | 1942 | Gerald Groveland Walsh | | | | | |
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| Men without God: the testimony of a reclaimed atheist | | 1932 | William A. Corey | | | | | |
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| The menace of atheism | | 1930 | William I. Lonergan | | | | | |
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| Milton and forbidden knowledge | | 1955 | John Howard Schultz | | | | | |
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| The necessity of atheism | | 1933 | David Marshall Brooks | | | | | |
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| New churches for old: a plea for community religion | | 1922 | John Haynes Holmes | | | | | |
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| The new humanism | | 1930 | Leon. Samson | | | | | |
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| The new tyranny: mysticism, scepticism | | 1927 | Francis J. Oppenheimer | | | | | |
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| The next step in religion | | 1918 | Roy Wood Sellars | | | | | |
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| On being creative | | 1932 | Irving Babbitt | | | | | |
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| On being human | | 1936 | Paul Elmer More | | | | | |
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| Philosophy and the concepts of modern science | | 1935 | Oliver Leslie Reiser | | | | | |
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| The psychology of scepticism and phenomenalism | | 1874 | fl. 1874 James Andrews, Roden Berkeley Wriothesley Noel | | | | | |
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| Érasme | | 1935 | Théodore Quoniam | | | | | |
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| Religion coming of age | | 1928 | Roy Wood Sellars | | | | | |
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| Religion in the U.S.S.R | | 1934 | Emel’íàn ÍÀroslavskiĭ | | | | | |
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| The rise of the modern spirit in Europe: a study of the prereformation age in its social, scientific, and literary aspects | | 1912 | George S. Butz | | | | | |
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| The rising tide: a novel dealing with the spread of bolshevism and atheism throughout America | | 1927 | Elizabeth Knauss | | | | | |
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| The sceptical approach to religion | | 1934 | Paul Elmer More | | | | | |
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| Sceptical essays | | 1928 | Bertrand Russell | | | | | |
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| Scepticism and animal faith: introduction to a system of philosophy | | 1955 | George Santayana | | | | | |
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| Some reflections on culture and liberty | | 1933 | Jacques Maritain | | | | | |
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| Struttura spirituale e linguistica del mondo neolatino. | | 1935 | Leonardo Olschki |  | | | | |
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| Theism and humanism | | 1915 | Earl of Arthur James Balfour Balfour | | | | | |
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| Theism and the modern mood | | 1930 | Walter Marshall Horton, William Adams Brown | | | | | |
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| Thought and expression in the sixteenth century | | 1920 | Henry Osborn Taylor | | | | | |
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| The truth about evolution | | 1934 | John Wesley Milam | | | | | |
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| The twilight of Christianity | | 1929 | Harry Elmer Barnes | | | | | |
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| Vital control | | 1934 | Lynn Harold Hough | | | | | |
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| We can surely believe: a Christian answer to current atheism | | 1928 | Howard Agnew Johnston | | | | | |
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