| 1921 | LIB2.1 | Libanius | Discours sur les patronages | da |
| 1922 | LIC1.1 | Granius Licinianus | Relivae | da |
| 1923 | LIC2.1 | Lickteig, Franz-Bernard | The german Carmelites at the Medieval universities | da |
| 1924 | LID1.1 | H. G. Lidell and R. Scott | Greek-English Lexicon, with a Revised Supplement | da |
| 1925 | LIE1.1 | Beatus Liebanensis | Obras completas y complementarias I (Comentario al Apocalipsis, Himno "O Dei Verbum", Apologético ) | da |
| 1926 | LIL1.1 | Lille, Alain de | Anticlaudianus | da |
| 1927 | LIL1.2 | Lille, Alain de | Viaggio della saggezza | da |
| 1928 | LIL1.3 | Lille, Alain de | Regeln der Theologie | da |
| 1929 | LIL1.4 | Lille, Alain de; Alverny, Marie-Thérèse d' | Textes inedits | da |
| 1930 | LIN1.1 | Lindberg, David C. | Beginnings of Western Science: The European Scientific Tradition in Philosophical, Religious, and Institutional Context, 600 B.C. to A.D. 1450 | nu |
