| 1841 | KLE1 | Klein, Jacob | A Commentary on Plato's Meno | nu |
| 1842 | KLI1.1 | Klibansky, Raymond | The continuity of the Platonic Tradition during the Middle Ages | da |
| 1843 | KLI2.1 | Klingner, F. | Boethii De consolatione Philosophiae | da |
| 1844 | KNO1.1 | Knoll, Paul W. | "A pearl of powerful learning": the university of Cracow in the fifteenth century | nu |
| 1845 | KNO2.1 | Knowles, David | The Evolution of Medieval Thought | nu |
| 1846 | KOG1.1 | Kogel, Julius | Petrus Lombardus in seiner Stellung zur Philosophie des Mittelalters | da |
| 1847 | KOL1.1 | Koller, Alexander (herausg.) | Kurie und Politik. Stand und Perspektiven der Nuntiaturberichtsforschung | da |
| 1848 | KON1.1 | König-Pralong, Catherine | Le bon usage des savoirs | da |
| 1849 | KON1.2 | Konig-Pralong, Katherine | Avenement de l'aristotelisme en terre chretienne | da |
| 1850 | KON1.3 | König-Pralong, Catherine | Etre, Essence & Contingence. Henri de Gand, Gilles de Rome, Godefroid de Fontaines | da |
