| 4231 | Carte | XEN1.6 | Xenophontis | Expeditio Cyri | da |
| 4232 | Carte | YEH1.2 | Yehudah ha-Leṿi | The Book of Kuzari | da |
| 4233 | Carte | YEH1.1 | Yĕhūdāh hal-Lēwī | Das Buch al-Chazari des Abû-L-Ḥasan Jehuda Hallewi | da |
| 4234 | Articol | X-yol1.2 | Yolles, Julian | Rethinking Abelard | da |
| 4235 | Carte | YOU2.1 | Young, Patrick | Catalogus librorum manuscriptorum bibliothecae wigorniensis | da |
| 4236 | Carte | YOU1.1 | Young, Spencer E. | Scholarly community at the early univerity of Paris : theologians, education and society, 1215-1248 | da |
| 4237 | Carte | YOU1.2 | Young, Spencer E. (ed.) | Crossing Boundaries at Medieval Universities | da |
| 4238 | Carte | ALB3.1 | Yūsuf al-Baṣīr | Das Buch der Unterscheidung | da |
| 4239 | Carte | ~D.LZ.1 | Zapartan, Liviu-Petru | Relatiile internationale | da |
| 4240 | Carte | ZEH1.1 | Zehnacker, Hubert ; Fredouille, Jean-Claude | Littérature latine | da |
