| Author | Titles | | 1.
| Olayo Filho, Pedro, 1930- | 3 | | 2.
| Olayo, Pedro, 1930- | 0 | | 3.
| Author is: Olayo Filho, Pedro, 1930- | 3 | | 4.
| Olayo, Pedro, filho | 0 | | 5.
| Author is: Olayo Filho, Pedro, 1930- | 3 | | 6.
| Olazabal Almada, Carmen | 2 | | 7.
| Olazábal, Ana | 1 | | 8.
| Olazabal, Pedro de | 1 | | 9.
| Olbert, Ernst A., pseud. | 1 | | 10.
| Olbrich, Harold | 3 | | 11.
| Olcay, Nekriman | 2 | | 12.
| Ölçer, Nazan | 2 |
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