| Author | Titles | | 1.
| Roberto, Paulo, 1958- | 1 | | 2.
| Roberto Polo Gallery (Bruxelas, Bélgica) | 1 | | 3.
| Roberto, Rita, 19--?- | 1 | | 4.
| Roberto, Rita, 1982- | 1 | | 5.
| Roberto, Umberto | 1 | | 6.
| Robertomaria, Sienna | 1 | | 7.
| Roberton, Gordon | 1 | | 8.
| Roberts, Alison | 1 | | 9.
| Roberts Allen | 1 | | 10.
| Roberts, Allen F., 1945- | 1 |
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