| Author | Titles | | 1.
| R. | 1 | | 2.
| R. A. | 1 | | 3.
| R. Alonso, Luis | 2 | | 4.
| R. B., 1935-2005 | 0 | | 5.
| Author is: Bertholo, René, 1935-2005 | 82 | | 6.
| R., Bárbara | 1 | | 7.
| R. C, 1864?-1919 | 0 | | 8.
| Author is: Carvalheira, Rosendo, 1864?-1919 | 4 | | 9.
| R., C., 1896?-1973 | 0 | | 10.
| Author is: Ribeiro, Carlos, 1896?-1973 | 2 | | 11.
| R., C. M. | 1 | | 12.
| R. Cristino, 1858-1948 | 0 | | 13.
| Author is: Cristino, Ribeiro, 1858-1948 | 10 | | 14.
| R. D. P. T. | 1 |
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