| 1916 | LAC2.1 | Lactantius | Von den Todesarten der Verfolger et al. | da |
| 1917 | LAF1.1 | Lafleur, Claude | Quatre introductions à la philosophie au XIIIe siècle | da |
| 1918 | LAG1.1.1 | Lagerlund, Henrik (ed.) | Encyclopedia of Medieval Philosophy. Philosophy Between 500 and 1500. Vol. 1 A-L | da |
| 1919 | LAG1.1.2 | Lagerlund, Henrik (ed.) | Encyclopedia of Medieval Philosophy. Philosophy Between 500 and 1500. Vol. 2 M-Z | da |
| 1920 | LAK1.1 | Laks, Andre | Diogene d'Apollonie | da |
| 1921 | LAN1.1 | Langermann, Y. Tzvi (ed.) | Avicenna and his legacy | da |
| 1922 | LAN2.1 | Landgraf, Artur Michael | Introduction a l'histoire de la littterature theologique de la scolastique naissante | da |
| 1923 | LAN3.1#1 | Lang, Helen S. | Aristotle's Physics and its medieval varieties | da |
| 1924 | LAN3.1#2 | Lang, Helen S. | Aristotle's Physics and its medieval varieties | da |
| 1925 | LAN4.1 | Landersdorfer, P. S. (tr.) | Ausgewälte Schriften der Syrischer Dichter | da |
| 1926 | LAN5.1 | Lancel, Serge | Saint Augustin | da |
| 1927 | LAS1.1 | Lassere, F. | Etude sur les extraits medievaux de Strabon suivie d'un traite inedit de Michel Psellus | da |
| 1928 | LAS2.1.1 | Laszlo, Alexandru | Lectura lui Dante. Infernul | da |
| 1929 | LAS2.1.2 | Laszlo, Alexandru | Lectura lui Dante. Purgatoriul | da |
| 1930 | LAS2.1.3 | Laszlo, Alexandru | Lectura lui Dante. Paradisul | da |
| 1931 | LAU1.1 | Laurent, Jerome | Les fondements de la nature dans la pensee de Plotin. Procession et participarion | da |
| 1932 | LAU2.1 | Laurand, L. | Etudes sur le style des Discours de Ciceron | da |
| 1933 | LAV1.1 | Rus, Anton; Castaldini, Alberto (ed.) | Sapientia et scientia theologica: in honorem Renzo Lavatori per l'80 genetliaco | da |
| 1934 | LEA1.1 | Leal, Jerónimo | Actas Latinas de Mártires Africanos | da |
| 1935 | LEB1.1 | Le Boulluec, Alain; Gabriela Soares Santoprete, Luciana; Timotin, Andrei (eds.) | Exégèse, révélation et formation des dogmes dans l’Antiquité tardive | da |
| 1936 | LEC1.1 | Lechner, Joan Marie | Renaissance concepts of the commonplaces | nu |
| 1937 | LEE1.1 | Lee, Richard A. | Science, the singular, and the questions of theology | da |
| 1938 | 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 |
| 1939 | LEE2.2 | Pieter de Leemans (ed.) | Aristotle's Problemata in different Times and Tongues | da |
| 1940 | 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 |
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