| Author | Titles | 1.
| Ottoni, Jose Eloi | 1 | 2.
| Ottoni, José Eloi | 1 | 3.
| Ottoni, Julio B. | 0 | 4.
| Ottoson, Olga O. | 1 | 5.
| Ou Ning, 1969- | 2 | 6.
| Ouane, Adama | 1 | 7.
| Ouarziz, Said, 1965- | 1 | 8.
| Oubrerie, Clément, 1966- | 1 | 9.
| Oubrerie, José | 1 | 10.
| Oud Hospitaal (Aalst, Bélgica) | 1 |
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