| Autor | Títulos | 1.
| Robertson, Martin | 5 | 2.
| Robertson, Michael | 6 | 3.
| Robertson, R. A. | 1 | 4.
| Robertson, Roland | 1 | 5.
| Robertson, Ronald G. | 1 | 6.
| Robertson, Theodore | 2 | 7.
| Robertson, Toni | 1 | 8.
| Robertson, William, 1721-1793 | 2 | 9.
| Roberty, Eugène de, 1843-1915 | 5 | 10.
| Robette, Sabine | 1 |
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