| Author | Titles | 1.
| Osborne, Robin | 1 | 2.
| Osborne, Stephen P. | 1 | 3.
| Óscar, 1913-1995 | 0 | 4.
| Author is: Lobo, Óscar Pinto, 1913-1995 | 19 | 5.
| Óscar, Paulo | 1 | 6.
| Óscar, Paulo, 1959- | 4 | 7.
| Óscar, Pedro | 1 | 8.
| Óscar Pinto Lobo, 1913-1995 | 0 | 9.
| Author is: Lobo, Óscar Pinto, 1913-1995 | 19 | 10.
| Oschütz, Ilse | 1 | 11.
| Ose, Elvira Dyangani | 1 | 12.
| Osella, Caroline | 1 |
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