| 1921 | KÜN1.1 | Küng, Hans | Dans Christentum.Wesen und Geschichte | da |
| 1922 | KÜN1.2 | Küng, Hans | Erkämpfte Freiheit | da |
| 1923 | KÜN1.3 | Küng, Hans | Die Kirche | da |
| 1924 | KUN2.1 | Kunitzsch, Paul | The Arabs and the stars: texts and traditions on the fixed stars, and their influence in medieval Europe | da |
| 1925 | KUR1.1.1 | Kurfess, A. (ed.) | Appendix Sallustiana I | da |
| 1926 | KUR1.1.2 | Kurfess, A. (ed.) | Appendix Sallustiana II | da |
| 1927 | KUR2.1 | Kurdziałek, Marian | Prolegomena zu Davidis de Dinanto Quaternulorum fragmenta | da |
| 1928 | LAB1.1 | Labarbe, Jules | L`Homere de Platon | da |
| 1929 | LAC1.1 | Lacrosse, Joachim | La philosophie de Plotin. Intellect et discursivite | nu |
| 1930 | LAC2.1 | Lactantius | Von den Todesarten der Verfolger et al. | da |
| 1931 | LAF1.1 | Lafleur, Claude | Quatre introductions à la philosophie au XIIIe siècle | da |
| 1932 | LAG1.1.1 | Lagerlund, Henrik (ed.) | Encyclopedia of Medieval Philosophy. Philosophy Between 500 and 1500. Vol. 1 A-L | da |
| 1933 | LAG1.1.2 | Lagerlund, Henrik (ed.) | Encyclopedia of Medieval Philosophy. Philosophy Between 500 and 1500. Vol. 2 M-Z | da |
| 1934 | LAK1.1 | Laks, Andre | Diogene d'Apollonie | da |
| 1935 | LAN1.1 | Langermann, Y. Tzvi (ed.) | Avicenna and his legacy | da |
| 1936 | LAN2.1 | Landgraf, Artur Michael | Introduction a l'histoire de la littterature theologique de la scolastique naissante | da |
| 1937 | LAN3.1#1 | Lang, Helen S. | Aristotle's Physics and its medieval varieties | da |
| 1938 | LAN3.1#2 | Lang, Helen S. | Aristotle's Physics and its medieval varieties | da |
| 1939 | LAN4.1 | Landersdorfer, P. S. (tr.) | Ausgewälte Schriften der Syrischer Dichter | da |
| 1940 | LAN5.1 | Lancel, Serge | Saint Augustin | da |
| 1941 | LAS1.1 | Lassere, F. | Etude sur les extraits medievaux de Strabon suivie d'un traite inedit de Michel Psellus | da |
| 1942 | LAS2.1.1 | Laszlo, Alexandru | Lectura lui Dante. Infernul | da |
| 1943 | LAS2.1.2 | Laszlo, Alexandru | Lectura lui Dante. Purgatoriul | da |
| 1944 | LAS2.1.3 | Laszlo, Alexandru | Lectura lui Dante. Paradisul | da |
| 1945 | LAU1.1 | Laurent, Jerome | Les fondements de la nature dans la pensee de Plotin. Procession et participarion | da |
| 1946 | LAU2.1 | Laurand, L. | Etudes sur le style des Discours de Ciceron | da |
| 1947 | LAV1.1 | Rus, Anton; Castaldini, Alberto (ed.) | Sapientia et scientia theologica: in honorem Renzo Lavatori per l'80 genetliaco | da |
| 1948 | LEA1.1 | Leal, Jerónimo | Actas Latinas de Mártires Africanos | da |
| 1949 | LEB1.1 | Le Boulluec, Alain; Gabriela Soares Santoprete, Luciana; Timotin, Andrei (eds.) | Exégèse, révélation et formation des dogmes dans l’Antiquité tardive | da |
| 1950 | LEC1.1 | Lechner, Joan Marie | Renaissance concepts of the commonplaces | nu |
| 1951 | LEE1.1 | Lee, Richard A. | Science, the singular, and the questions of theology | da |
| 1952 | LEE2.1 | Pieter de Leemans (ed.) | Translating at the Court. Bartholomew o Messina and Cultural Life at the Court of Manfred, King of Sicily | da |
| 1953 | LEE2.2 | Pieter de Leemans (ed.) | Aristotle's Problemata in different Times and Tongues | da |
| 1954 | LEE2.3 | Pieter de Leemans (ed.) | Between Text and Tradition. Pietro d'Abano and the Reception of Pseudo-Aristotle's Problemata Physica in the Middle Ages | da |
| 1955 | LEE2.4 | Pieter de Leemans (ed.) | On Good Authority. Tradition, Compilation and the Construction of Authority in Literature from Antiquity to the Renaissance | da |
| 1956 | LEF1.1 | Leff, Gordon | Paris and Oxford Universities in the thirteenth and fourteenth century | da |
| 1957 | LEF2.1 | Lefèvre, Charles | Sur l'évolution d'Aristote en phychologie | da |
| 1958 | LEF3.1 | Lefkowitz, Mary R. | Women in Greek myth | da |
| 1959 | LEF4.1 | Lefebvre, David | Dynamis : sens et genèse de la notion aristotélicienne de puissance | da |
| 1960 | LEH1.1 | Lehmann, Yves (ed.) | Aristoteles Romanus. La reception de la science aristotelicienne dans l'Empire greco-romain | da |
| 1961 | LEH2.1 | Lehrs, Karl | Quaestiones epicae | da |
| 1962 | LEM1.1 | Lemoine, Michel; Picard-Parra, Clotilde (trad.) | Théologie et cosmologie au XIIe siècle. L'Ecole de Chartres | nu |
| 1963 | LEO1.1 | Leonardi, Claudio | Anastasio Bibliotecario e l'ottavo concilio ecumenico | da |
| 1964 | LEO1.2 | Leonardi, Claudio | Gregorio Magno e le Origini dell'Europa | da |
| 1965 | LEO2.1.1 | Leo des Grossen | Samtliche Sermonen (1-38) | da |
| 1966 | LEO2.1.2 | Leo des Grossen | Samtliche Sermonen (39-96) | da |
| 1967 | LEO3.1 | Leone, Marialucrezia | Sinderesi. La conoscenza immediata dei principi morali tra Medioevo e prima Età Moderna | da |
| 1968 | LEPh2012.04.2 | | Les Etudes philosophiques. n° 2 (2012), Marius Victorinus | da |
| 1969 | LES1.1 | Lessines, Gilles de; De Wulf, Maurice | Le Traite De Unitate Formae | da |
| 1970 | LET1.1 | M. Letronne (editor) | Fragmenta Historicorum Graecorum. Apollodori Bibliotheca | da |
