| Author | Titles | | 1.
| Riotor, Léon, 1865-1946 | 2 | | 2.
| Riottot El-Habib, Béatrice | 1 | | 3.
| Riou, 1833-1900 | 3 | | 4.
| Riou, Edouard, 1833-1900 | 0 | | 5.
| Author is: Riou, 1833-1900 | 3 | | 6.
| Riou, Gaston, 1883-? | 1 | | 7.
| Riou, Marc | 1 | | 8.
| Riou, Yves-Jean | 1 | | 9.
| Riout, Denys, 1943- | 7 | | 10.
| Rioux, J. E. | 1 | | 11.
| Ripa, Cesare, 1560?-1625? | 3 |
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