| Author | Titles | | 1.
| Richters, Christian, 1958- | 2 | | 2.
| Rickard, Jonathan | 1 | | 3.
| Rickard, Peter | 2 | | 4.
| Ricke, Helmut | 6 | | 5.
| Rickels, Laurence A. | 1 | | 6.
| Rickerby, Stephen | 1 | | 7.
| Rickert, Heinrich | 1 | | 8.
| Rickert, Margaret | 2 | | 9.
| Ricketts, C., 1866-1931 | 0 | | 10.
| Author is: Ricketts, Charles, 1866-1931 | 1 | | 11.
| Ricketts, Charles, 1866-1931 | 1 |
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