| Author | Titles | | 1.
| Oliva i Buxton, Victòria | 1 | | 2.
| Oliva Maria Zulmira | 1 | | 3.
| Oliva, Víctor | 2 | | 4.
| Oliva, Zulmira, 1930- | 4 | | 5.
| Olival, Fernanda | 1 | | 6.
| Olival, Luís | 1 | | 7.
| Olivar Bertrand, Rafael | 1 | | 8.
| Olivares, Ana | 1 | | 9.
| Olivares, Fernando Solana | 1 | | 10.
| Olivares, Gregório de | 1 |
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