| Author | Titles | | 1.
| Okas, Jüri, 1950- | 1 | | 2.
| Okasaka, Sakurako | 1 | | 3.
| Okazaki, Maho | 1 | | 4.
| Okazaki, Shintaro | 1 | | 5.
| O'Keeffe, Georgia, 1887-1986 | 10 | | 6.
| O'Keeffe, Georgia Totto, 1887-1986 | 0 | | 7.
| Author is: O'Keeffe, Georgia, 1887-1986 | 10 | | 8.
| O'Keeffe Museum (Novo México, Estados Unidos) | 0 | | 9.
| Author is: Georgia O'Keeffe Museum (Novo México, Estados Unidos ) | 3 | | 10.
| Okeke Augulu, Chika | 0 | | 11.
| Author is: Okeke-Agulu, Chika 1966- | 1 | | 12.
| Okeke-Agulu, Chika | 1 | | 13.
| Okeke-Agulu, Chika 1966- | 1 |
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