| Author | Titles | | 1.
| Roncali, Leoni | 1 | | 2.
| Roncari, Armida | 1 | | 3.
| Roncero, Rafael Doctor, 1966- | 0 | | 4.
| Author is: Doctor Roncero, Rafael, 1966- | 6 | | 5.
| Ronchetti, Costanza | 1 | | 6.
| Ronchetti, Mario | 1 | | 7.
| Ronchi, Alfredo M. | 1 | | 8.
| Ronchi, Vasco | 1 | | 9.
| Ronchí, Vittoria | 1 | | 10.
| La Roncière, Charles de, 1870-1941 | 2 | | 11.
| Roncuzzi, Isotta Fiorentini | 1 |
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