| Author | Titles | 1.
| Ravenel, Gaillard F. | 1 | 2.
| Ravenna, Cristiana Moldi | 1 | 3.
| Ravens, Michael | 1 | 4.
| Ravenstein, E. G., 1834-1913 | 2 | 5.
| Raventós, R. | 1 | 6.
| Raverté, Ramón | 1 | 7.
| Ravesteijn, Adriaan van | 1 | 8.
| Ravey, Yves | 1 | 9.
| Ravilious, C. P. | 1 | 10.
| Ravin, James G. | 1 |
|
|