| Author | Titles | | 1.
| Otero Tuñez, Ramón | 6 | | 2.
| Otero-Yglesias, Jesús, 1963- | 1 | | 3.
| Othenin-Girard, Madeleine | 1 | | 4.
| Othman, Charlotte | 1 | | 5.
| Otmezguine, Jane | 1 | | 6.
| OTO arquitectos (Firma de arquitectura) | 3 | | 7.
| Otolith (Grupo de artistas) | 2 | | 8.
| Otomo, Yosuke | 1 | | 9.
| O'Toole, Fintan, 1958- | 2 | | 10.
| O'Toole, J. | 11 |
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