| Author | Titles | 1.
| Ridgewell, Martyn | 2 | 2.
| Ridgway, Brunilde Sismondo | 2 | 3.
| Ridgway, Christopher | 1 | 4.
| Ridgway, Maurice H. | 1 | 5.
| Riding, Christine | 1 | 6.
| Ridley, Aaron | 3 | 7.
| Ridley, M. R. | 1 | 8.
| Ridley, Michael | 1 | 9.
| Ridolfi, Carlo | 1 | 10.
| Ridolfi, Roberta, 1968- | 1 |
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