| 4226 | Carte | WYS1.1 | Wyser, Paul | Thomas von Aquin | da |
| 4227 | Carte | XEN1.2 | Xenophon | Memorabilia | da |
| 4228 | Carte | XEN1.4 | Xenophon | Institutio Cyri | da |
| 4229 | Carte | XEN1.5 | Xenophon | De Re Equestri | da |
| 4230 | Carte | XEN1.1 | Xenophon | Anabase (Morceaux choisis) | da |
| 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 |
| 4241 | Carte | ZEL1.1.1 | Zeller, Edoardo | La filosofia dei greci nel suo sviluppo storico (vol. I) | da |
| 4242 | Carte | ZEL1.1.2 | Zeller, Edoardo; Mondolfo, R. | La filosofia de greci nel suo sviluppo storico (vol. II) | da |
| 4243 | Carte | ZEL2.1 | Zeller, Franz | Die Apostolischen Väter | da |
| 4244 | Carte | BIBL1.16 | Zerdoun Bat-Yehouda, Monique | Les papiers filigranés des manuscrits hébreux datés jusqu'à 1450 | da |
| 4245 | Carte | ZIC1.1#2 | Zickermann, Kathrin | Across the German Sea. Early Modern Scottish Connections with the Wider Elbe-Weser Region | da |
| 4246 | Carte | ZIC1.1#1 | Zickermann, Kathrin | Across the German Sea. Early Modern Scottish Connections with the Wider Elbe-Weser Region | da |
| 4247 | Carte | ZWA1.1 | Zwaenepoel, John P. | Les quaestiones in Librum de causis atribuées à Henri de Gand | da |
| 4248 | Carte | MAR5.2 | [Marcus Aurelius] M. Antoninus Imperator | Ad se ipsum | da |
| 4249 | Carte | SAB1.1 | ʻAbd al-Ḥaqq ibn Ibrāhīm Ibn Sabʻīn | Die Sizilianischen Fragen | da |
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