| Author | Titles | | 1.
| Roma. Istituto di Studi Romani | 1 | | 2.
| Roma, Valentín | 2 | | 3.
| Romagosa, Gemma | 1 | | 4.
| Romaguera i Ramió, Joaquim | 36 | | 5.
| Romahn, Carolina | 1 | | 6.
| Romain, G. | 1 | | 7.
| Romain, Hippolyte | 1 | | 8.
| Romain, Jules, 1499-1546 | 1 | | 9.
| Romain, Lothar | 1 | | 10.
| Romains, Jules | 2 |
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