| 1801 | JOL1.8 | Jolivet, Jean | Abelard ou la philosophie dans le langage | da |
| 1802 | JON1.1 | Jones, W.T. | The medieval mind | da |
| 1803 | JOR1.1 | Jordan von Quedlinburg | Postillae et Sermones | da |
| 1804 | JUL1.1 | Julia, Didier | Dictionnaire de la philosophie | da |
| 1805 | JUN1.1 | Jung-Palczewska, Elzbieta | Prima verba. Krakowskie mowy uniwersyteckie | da |
| 1806 | KAG1.1 | Kagan, Donald (ed.) | Studies in the Greek Historians | da |
| 1807 | KAL1.1 | Kaluza, Zenon | Lektury Filozoficzne Wincentego Kadlubka. Zbior Studiow | da |
| 1808 | KAL1.2 | Kaluza, Zenon | Etudes doctrinales sur le XIVe siecle. Theologie, logique, philosophie | nu |
| 1809 | KAL1.3 | Kaluza, Zenon | Les querelles doctrinales a Paris. Nominalistes et realistes aux confins du XIVe et du XVe siecle | da |
| 1810 | KAL1.4 | Kaluza, Zenon | Nicolas d'Autrecourt, ami de la verite | nu |
| 1811 | KAL2.1 | Kalhous, David | Anatomy of a duchy. The political and ecclesiastical structures of early Přemyslid Bohemia | da |
| 1812 | KAM1.1 | Ibn-Kammūna, Saʿd Ibn-Manṣūr | Examen de la critique des trois religions monothéistes | da |
| 1813 | KAN1.1 | Kant, Immanuel | Prolegomene la orice metafizica viitoare care se va putea infatisa drept stiinta | da |
| 1814 | KAN1.2 | Kant, Immanuel | Critica raţiunii practice | da |
| 1815 | KAN2.1 | Kandler, K.-H.; Mojsisch, B.; Stammkotter, F.-B. | Dietrich von Freiberg. Neue Perspektiven seiner Philosophie, Theologie und Naturwissenschaft | da |
| 1816 | KAP1.1 | Kaposi, Krisztina (ed.) | Enyedi 460. Tanulmanykotet Enyedi Gyorgy szuletesenek 460 evfordulojara rendezett kamarakonferencia eloadasaibol | da |
| 1817 | KAS1.1 | Kassel, Rudolf | Der text der aristotelischen phetorik | da |
| 1818 | KEC1.1 | Bartholomaeus Keckermann | Praecognita philosophica | da |
| 1819 | KEN1.1 | Kenny, Anthony | Aquinas on mind | da |
| 1820 | KEN2.1 | Kennedy, Edward S. | Astronomy and astrology in the Medieval Islamic world | da |
| 1821 | KES1.1 | Kesper-Biermann, Sylvia | Kriminalität in Mittelalter und Früher Neuzeit : soziale, rechtliche, philosophische und literarische Aspekte | da |
| 1822 | KEU1.1 | Keuls, Eva C. | Plato And Greek Painting | da |
| 1823 | KIE1.1.3 | Kieckers, E. | Historische griechische Grammatik. Syntax III | da |
| 1824 | KIE1.1.4 | Kieckers, E. | Historische griechische Grammatik. Syntax IV | da |
| 1825 | KIL1.1.2 | Robert Kilwardby | Quaestiones in librum secundum Sententiarum | da |
| 1826 | KIL1.1.5 | Robert Kilwardby | Quaestiones in quattuor libros sententiarum-appendix | da |
| 1827 | KIL1.2 | Kilwardby, Robert; Judy, Albert G. (ed.) | De ortu scientiarum | da |
| 1828 | KIL1.3 | Kilwardby, Robert; Lewry, P. Osmund (ed.) | On Time and Imagination. De Tempore. De Spiritu Fantastico | da |
| 1829 | KIR1.1 | Kirk, G.S.; Raven, J.E. | The Presocratic Philosophers | da |
| 1830 | KIR2.1.3 | Gert Haendler | Kirchengeschichte in Einzeldarstellungen, Band I/03 | da |
| 1831 | KIR2.1.5 | Gert Haendler | Kirchengeschichte in Einzeldarstellungen, Band I/05 | da |
| 1832 | KIR2.1.6 | Friedhelm Winkelmann | Kirchengeschichte in Einzeldarstellungen, Band I/06 | da |
| 1833 | KIR3.1 | Kirk, G. S. | The Homeric Poems As History | da |
| 1834 | KIR4.1 | Kirby, Gerald J. | Law in the Writings of John of Salisbury and St. Thomas Aquinas | da |
| 1835 | 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 |
| 1836 | KIT1.1#1 | Kitanov, Severin Valentinov | Beatific Enjoyment in Medieval Scholastic Debates. The Complex Legacy of Saint Augustine and Peter Lombard | da |
| 1837 | KIT1.1#2 | Kitanov, Severin Valentinov | Beatific Enjoyment in Medieval Scholastic Debates. The Complex Legacy of Saint Augustine and Peter Lombard | nu |
| 1838 | KLE1 | Klein, Jacob | A Commentary on Plato's Meno | nu |
| 1839 | KLI1.1 | Klibansky, Raymond | The continuity of the Platonic Tradition during the Middle Ages | da |
| 1840 | KLI2.1 | Klingner, F. | Boethii De consolatione Philosophiae | da |
| 1841 | KNO1.1 | Knoll, Paul W. | "A pearl of powerful learning": the university of Cracow in the fifteenth century | nu |
| 1842 | KNO2.1 | Knowles, David | The Evolution of Medieval Thought | nu |
| 1843 | KOG1.1 | Kogel, Julius | Petrus Lombardus in seiner Stellung zur Philosophie des Mittelalters | da |
| 1844 | KOL1.1 | Koller, Alexander (herausg.) | Kurie und Politik. Stand und Perspektiven der Nuntiaturberichtsforschung | da |
| 1845 | KON1.1 | König-Pralong, Catherine | Le bon usage des savoirs | da |
| 1846 | KON1.2 | Konig-Pralong, Katherine | Avenement de l'aristotelisme en terre chretienne | da |
| 1847 | KON1.3 | König-Pralong, Catherine | Etre, Essence & Contingence. Henri de Gand, Gilles de Rome, Godefroid de Fontaines | da |
| 1848 | KON1.4 | König-Pralong, Catherine | Médiévisme philosophique et raison moderne. De Pierre Bayle à Ernest Renan | da |
| 1849 | KOO1.1 | Kooper, Erik; Levelt, Sjoerd | The Medieval Chronicle IX | da |
| 1850 | KOT1.1 | Kotkas, Toomas | Royal Police Ordinances In Early Modern Sweden The Emergence Of Voluntaristic Understanding Of Law | da |
