| Autor | Títulos | | 1.
| Ruggero, Cristina | 1 | | 2.
| Ruggieri, Jole | 1 | | 3.
| Ruggieri, Jole Scudieri | 1 | | 4.
| Ruggieri, Luciantonio | 1 | | 5.
| Ruggieri, Rossana | 2 | | 6.
| Ruggiero, Carla | 1 | | 7.
| Rugoff, Ralph, 1957- | 12 | | 8.
| Ruhé, Harry | 1 | | 9.
| Ruhemann, Helmut | 2 | | 10.
| Ruhlmann, Émile Jacques, 1879-1933 | 2 |
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