| Author | Titles | | 1.
| Racinet, M. A. | 1 | | 2.
| Rackham, Arthur, 1867-1939 | 3 | | 3.
| Rackham, Bernard | 3 | | 4.
| Rackus, Alexander M. | 1 | | 5.
| Rácz, Eva | 1 | | 6.
| Raczynski, A., conde, 1788-1874 | 0 | | 7.
| Author is: Raczynski, Athanasius, conde, 1788-1874 | 4 | | 8.
| Raczynski, Atanasy, conde, 1788-1874 | 0 | | 9.
| Author is: Raczynski, Athanasius, conde, 1788-1874 | 4 | | 10.
| Raczynski, Athanasius, conde, 1788-1874 | 4 | | 11.
| Rada, Martín da, Frei | 1 | | 12.
| Rada, Pravoslav | 3 |
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