| Author | Titles | | 1.
| Riopelle, Christopher | 4 | | 2.
| Riopelle, Jean Paul, 1923-2002 | 3 | | 3.
| Riordan, Maurice | 2 | | 4.
| Rios, Conceição | 2 | | 5.
| Rios Gutierrez, Ivan de los | 1 | | 6.
| Rios, Humberto Andrés | 1 | | 7.
| Ríos, Julián | 1 | | 8.
| Rios Magriná, Olga de los | 1 | | 9.
| Rios, Margarida | 1 | | 10.
| Los Ríos Martínez, Esperanza de | 1 |
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