| Author | Titles | 1.
| Oakley, Marcus | 1 | 2.
| Oakley, Penny | 2 | 3.
| Oakville Galleries (Oakville, Canadá) | 1 | 4.
| Oates, E. F. | 1 | 5.
| Oates, Joyce Carol | 1 | 6.
| Oates, Phyllis Bennett | 2 | 7.
| Obal, Liliana | 1 | 8.
| Obalk, Hector, 1960- | 2 | 9.
| Obalne Galerije (Piran, Eslovénia) | 3 | 10.
| O'Bannon, George W. | 1 |
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