| 3851 | XEN1.6 | Xenophontis | Expeditio Cyri | da |
| 3852 | YEH1.2 | Yehudah ha-Leṿi | The Book of Kuzari | da |
| 3853 | YEH1.1 | Yĕhūdāh hal-Lēwī | Das Buch al-Chazari des Abû-L-Ḥasan Jehuda Hallewi | da |
| 3854 | YOU2.1 | Young, Patrick | Catalogus librorum manuscriptorum bibliothecae wigorniensis | da |
| 3855 | YOU1.1 | Young, Spencer E. | Scholarly community at the early univerity of Paris : theologians, education and society, 1215-1248 | da |
| 3856 | YOU1.2 | Young, Spencer E. (ed.) | Crossing Boundaries at Medieval Universities | da |
| 3857 | ALB3.1 | Yūsuf al-Baṣīr | Das Buch der Unterscheidung | da |
| 3858 | ~D.LZ.1 | Zapartan, Liviu-Petru | Relatiile internationale | da |
| 3859 | ZEH1.1 | Zehnacker, Hubert ; Fredouille, Jean-Claude | Littérature latine | da |
| 3860 | ZEL1.1.1 | Zeller, Edoardo | La filosofia dei greci nel suo sviluppo storico (vol. I) | da |
