| Author | Titles | 1.
| Oskian, Hamazasp, 1895-1968 | 2 | 2.
| Oskian, P. Hamazasp | 1 | 3.
| Osler, Mirabel | 1 | 4.
| Osler, Patricia | 1 | 5.
| Oslet, Gustave | 2 | 6.
| Osley, A. S. | 1 | 7.
| Oslo Museum, Interkulturelt Museum (Noruega) | 1 | 8.
| Osma, Guillermo de | 1 | 9.
| Osman, Amira O. S. | 1 | 10.
| Osman Hamdi Bey, 1842-1910 | 1 |
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