| 1891 | KES1.1 | Kesper-Biermann, Sylvia | Kriminalität in Mittelalter und Früher Neuzeit : soziale, rechtliche, philosophische und literarische Aspekte | da |
| 1892 | KEU1.1 | Keuls, Eva C. | Plato And Greek Painting | da |
| 1893 | KIE1.1.3 | Kieckers, E. | Historische griechische Grammatik. Syntax III | da |
| 1894 | KIE1.1.4 | Kieckers, E. | Historische griechische Grammatik. Syntax IV | da |
| 1895 | KIL1.1.2 | Robert Kilwardby | Quaestiones in librum secundum Sententiarum | da |
| 1896 | KIL1.1.5 | Robert Kilwardby | Quaestiones in quattuor libros sententiarum-appendix | da |
| 1897 | KIL1.2 | Kilwardby, Robert; Judy, Albert G. (ed.) | De ortu scientiarum | da |
| 1898 | KIL1.3 | Kilwardby, Robert; Lewry, P. Osmund (ed.) | On Time and Imagination. De Tempore. De Spiritu Fantastico | da |
| 1899 | KIR1.1 | Kirk, G.S.; Raven, J.E. | The Presocratic Philosophers | da |
| 1900 | KIR2.1.3 | Gert Haendler | Kirchengeschichte in Einzeldarstellungen, Band I/03 | da |
| 1901 | KIR2.1.5 | Gert Haendler | Kirchengeschichte in Einzeldarstellungen, Band I/05 | da |
| 1902 | KIR2.1.6 | Friedhelm Winkelmann | Kirchengeschichte in Einzeldarstellungen, Band I/06 | da |
| 1903 | KIR3.1 | Kirk, G. S. | The Homeric Poems As History | da |
| 1904 | KIR4.1 | Kirby, Gerald J. | Law in the Writings of John of Salisbury and St. Thomas Aquinas | da |
| 1905 | KIS1.1 | Kisseleva, Ludmila; Stirnemann, Patricia (eds.) | Catalogue des manuscrits medievaux en ecriture latine de la Bibliotheque de l'Academie des Sciences de Russie de Saint-Petersbourg | da |
| 1906 | KIT1.1#1 | Kitanov, Severin Valentinov | Beatific Enjoyment in Medieval Scholastic Debates. The Complex Legacy of Saint Augustine and Peter Lombard | da |
| 1907 | KIT1.1#2 | Kitanov, Severin Valentinov | Beatific Enjoyment in Medieval Scholastic Debates. The Complex Legacy of Saint Augustine and Peter Lombard | da |
| 1908 | KLE1 | Klein, Jacob | A Commentary on Plato's Meno | nu |
| 1909 | KLI1.1 | Klibansky, Raymond | The continuity of the Platonic Tradition during the Middle Ages | da |
| 1910 | KLI2.1 | Klingner, F. | Boethii De consolatione Philosophiae | da |
| 1911 | KNO1.1 | Knoll, Paul W. | "A pearl of powerful learning": the university of Cracow in the fifteenth century | nu |
| 1912 | KNO2.1 | Knowles, David | The Evolution of Medieval Thought | da |
| 1913 | KOG1.1 | Kogel, Julius | Petrus Lombardus in seiner Stellung zur Philosophie des Mittelalters | da |
| 1914 | KOL1.1 | Koller, Alexander (herausg.) | Kurie und Politik. Stand und Perspektiven der Nuntiaturberichtsforschung | da |
| 1915 | KON1.1 | König-Pralong, Catherine | Le bon usage des savoirs | da |
| 1916 | KON1.2 | Konig-Pralong, Katherine | Avenement de l'aristotelisme en terre chretienne | da |
| 1917 | KON1.3 | König-Pralong, Catherine | Etre, Essence & Contingence. Henri de Gand, Gilles de Rome, Godefroid de Fontaines | da |
| 1918 | KON1.4 | König-Pralong, Catherine | Médiévisme philosophique et raison moderne. De Pierre Bayle à Ernest Renan | da |
| 1919 | KOO1.1 | Kooper, Erik; Levelt, Sjoerd | The Medieval Chronicle IX | da |
| 1920 | KOT1.1 | Kotkas, Toomas | Royal Police Ordinances In Early Modern Sweden The Emergence Of Voluntaristic Understanding Of Law | da |
| 1921 | KOW1.1 | Kowalczyk, Maria | Krakowskie mowy uniwersyteckie z pierwszej polowy XV wieku | da |
| 1922 | KRA1.1 | Kraut, Richard | The Cambridge companion to Plato | da |
| 1923 | KRA2.1 | Kraemer, Joel L. | Humanism in the renaissance of Islam: the cultural revival during the Buyid age | da |
| 1924 | KRE1.1 | Kremer, Klaus | Die Neoplatonische Seinsphilosophie und ihre Wirkung auf Thomas von Aquin | da |
| 1925 | KRE2.1 | Kretzmann, N.; Kenny, A.; Pinborg, A. | The Cambridge Companion to Later Medieval Philosophy | da |
| 1926 | KRI1.1 | Kristeller, Paul Oskar | Latin Manuscript Books before 1600 | da |
| 1927 | KRI1.2.1 | Kristeller, Paul Oskar (ed.) | Catalogus translationum et commentariorum: Medieval and Renaissance Latin Translations and Commentaries | da |
| 1928 | KRI1.3 | Kristeller, Paul Oskar | Renaissance thought and its sources | nu |
| 1929 | KRU1.1 | Krüger, Max | Griechisches Ubungsbuch | da |
| 1930 | KRU2.1 | Kruger, Gerhart | Ragione e Passione, L'essenza del pensiero platonico | da |
| 1931 | KUH1.1 | Kühn, Wilfried | Quel savoir après le scepticisme? | da |
| 1932 | KÜN1.1 | Küng, Hans | Dans Christentum.Wesen und Geschichte | da |
| 1933 | KÜN1.2 | Küng, Hans | Erkämpfte Freiheit | da |
| 1934 | KÜN1.3 | Küng, Hans | Die Kirche | da |
| 1935 | KUN2.1 | Kunitzsch, Paul | The Arabs and the stars: texts and traditions on the fixed stars, and their influence in medieval Europe | da |
| 1936 | KUR1.1.1 | Kurfess, A. (ed.) | Appendix Sallustiana I | da |
| 1937 | KUR1.1.2 | Kurfess, A. (ed.) | Appendix Sallustiana II | da |
| 1938 | KUR2.1 | Kurdziałek, Marian | Prolegomena zu Davidis de Dinanto Quaternulorum fragmenta | da |
| 1939 | LAB1.1 | Labarbe, Jules | L`Homere de Platon | da |
| 1940 | LAC1.1 | Lacrosse, Joachim | La philosophie de Plotin. Intellect et discursivite | nu |
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