| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
|---|
 |  |  | 
|
|---|
| The concept in Thomism | | 1952 | John Frederick Peifer | |  | |  | | 
|
| Critical realism: a study of the nature and conditions of knowledge | | 1916 | Roy Wood Sellars | | | |  | |   
|
| Die Grundbegriffe der Erkenntnis | | 1913 | August Stadler, J. (Julius) Platter |  | | | | |
|
| Die realisierung: ein beitrag zur grundlegung der realwissenschaften | | 1912 | Oswald Külpe, August Messer |  | | | | |
|
| Die unmöglichkeit der erkenntnistheorie: vortrag gehalten am 11. april, 1911, auf dem 4. internationalen kongress für philosophie in Bologna | | 1911 | Leonard Nelson | | | | | |
|
| Die wahrheit: ein erkenntnistheoretischer versuch orientiert an Rickert, Husserl und an Vaihingers "Philosophie des als-ob," | | 1913 | Adolf Lapp, Heinrich Rickert, Edmund Husserl | | | | | |
|
| Die Wissenschaftslehre Vorgetragen im Jahre 1804 | | 1922 | Fritz Medicus, Johann Gottlieb Fichte | | | | | |
|
| Einführung in die metaphysik: auf grundlage der erfahrung | 2. durchgesehene und verm. aufl. | 1911 | Gerard Heymans | | | | | |
|
| The elements of intellectual science : a manual for schools and colleges | | 1871 | Noah Porter | | | | | |
|
| The elements of intellectual science : a manual for schools and colleges | | 1871 | Noah Porter | | | | | |
|
| Erkennen und Leben | | 1912 | Rudolf Eucken | | | | | |
|
| An essay concerning human understanding | | 1959 | John Locke | | | | | |
|
| Essays towards a theory of knowledge | | 1915 | Alexander Philip, Alexander Philip | | | | | |
|
| Evolution, Knowledge and revelation | | 1924 | Stewart Andrew McDowall | | | | | |
|
| Grundprobleme der Kritik der reinen Vernunft | | 1914 | Artur Buchenau | | | | | |
|
| The horizons of thought: a study in the dualities of thinking | | 1933 | George Perrigo Conger | | | | | |
|
| The human intellect : with an introduction upon psychology and the soul | | 1868 | Noah Porter | | | | | |
|
| Idealism, possible and impossible | | 1911 | Alice Bhmdell, Alice Blundell | | | | | |
|
| Kant's theory of knowledge | | 1909 | H. A. (Harold Arthur) Prichard | | | | | |
|
| Kategorienlehre | | 1896 | Eduard von Hartmann | | | | | |
|
| The learning process: or, Educational theory implied in theory of knowledge | | 1907 | Jesse Harliaman Coursault | | | | | |
|
| Logik | | 1912 | W. (Wilhelm) Windelband, Louis Couturat, Nikolaj Losskij | | | | | |
|
| Möglichkeit und widerspruchslosigkeit | | 1912 | Hans Pichler | | | | | |
|
| Moral, aesthetic, and religious insight | | 1957 | Theodore Meyer Greene | | | | | |
|
| The new realism: coöperative studies in philosophy by Edwin B. Holt | | 1912 | Walter Taylor Marvin, Edwin Bissell Holt, Edward Gleason Spaulding | | | |  |  |
|
| Objectivity | | 1955 | William Earle | | | | | |
|
| The organization of knowledge: an introduction to philosophical analysis | | 1942 | Glenn Negley | | | | | |
|
| Perceptual theory of knowledge | | 1954 | Peter Fireman | | | | | |
|
| Philosophical theory and psychological fact: an attempt at synthesis | | 1961 | Charles F. Wallraff | | | | | |
|
| The philosophies of F. R. Tennant and John Dewey | | 1950 | J. Oliver (James Oliver) Buswell | | | | | |
|
| The philosophy of Malebranche: a study of his integration of faith, reason, and experimental observation | | 1963 | Beatrice K. Rome | | | | | |
|
| The philosophy of Schleiermacher: the development of his theory of scientific and religious knowledge | "First edition." | 1941 | Richard B. Brandt | | | | | |
|
| The problem of knowledge | | 1915 | Douglas Clyde Macintosh | | | | | |
|
| Savoir!: considérations sur la méthode scientifique, la guerre et la morale | | 1917 | Félix Alexandre Le Dantec |  | | | | |
|
| Some phases in the development of the subjective point of view during the post-Aristotelian period | | 1911 | Dagny Gunhilda Sunne | | | | | |
|
| Subject and object | | 1915 | Johnston Estep Walter | | | | | |
|
| Truth and reality: an introduction to the theory of knowledge | | 1911 | John Elof. Boodin | | | | | |
|
| The truth of thought; or, Material logic: a short treatise on the initial philosophy, the groundwork necessary for the consistent pursuit of knowledge | | 1916 | William Poland | | | | | |
|
| Vom zuge der menschheit | | 1912 | Fritz Fidler | | | | | |
|
| Weltbegriff und Erkenntnisbegriff: eine Erkenntnistheoretische Untersuchung | | 1912 | Viktor Kraft | | | | | |
|
| What can I know?: An inquiry into truth, its nature, the means of its attainment, and its relations to the practical life | | 1914 | George Trumbull Ladd | | | | | |
|
| Wissenschaft und wirklichkeit | | 1912 | | | | | | |
|
Public Domain Books