| Author | Titles | 1.
| Roa, Ryan | 2 | 2.
| Roach, Damien, 1980- | 1 | 3.
| Roaf, Caroline | 1 | 4.
| Roaf, Michael | 1 | 5.
| Roalf, Peggy | 1 | 6.
| Roani, Roberta | 1 | 7.
| Roas, Marlene Dias, 1956- | 0 | 8.
| Author is: Rosa, Marlene, 1956- | 1 | 9.
| Roault, Georges, 1871-1958 | 1 | 10.
| Robacker, Earl F. | 1 | 11.
| Robakowski, Józef, 1939- | 2 |
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