| 2821 | OSB1.1.1 | Osbernus de Gloucester | Derivazioni, vol. I | da |
| 2822 | OSB1.1.2 | Osbernus de Gloucester | Derivazioni, vol. II | da |
| 2823 | OSW1.1 | Oswald, Dana M. | Monster, Gender and Sexuality in Medieval English Literature | da |
| 2824 | REG1.1 | Otto Regenbogen | Schmerz und tod in den tragodien Senecas | da |
| 2825 | OUY1.1.1#2 | Ouy, Gilbert | Les Manuscrits de L'Abbaye de Saint-Victor, vol. I | da |
| 2826 | OUY1.1.2#2 | Ouy, Gilbert | Les Manuscrits de L'Abbaye de Saint-Victor, vol. II | da |
| 2827 | OZO1.1 | Ożóg, Krzysztof | The Role of Poland in the Intellectual Development of Europe in the Middle Ages | da |
| 2828 | OBR1.1 | O`BRIEN, D. | Pour interpreter Empedocle | da |
| 2829 | BAU4.1 | P. Chrysostomus Baur O.S.B. | Initia Patrum Graecorum (vol. 1 A-Λ ) | da |
| 2830 | BAU4.2 | P. Chrysostomus Baur O.S.B. | Initia Patrum Graecorum (vol. 1 M-Ω ) | da |
