| Author | Titles | | 1.
| Roels, Hans | 1 | | 2.
| Roels Jr, Reynaldo | 10 | | 3.
| Roelstraete, Dieter, 1972- | 5 | | 4.
| Roemans, Rob. | 1 | | 5.
| Roemer, Alex | 1 | | 6.
| Roemer-und Pelizaeus-Museum ( (Hildesheim, Alemanha) | 1 | | 7.
| Roenisch, Rowan | 1 | | 8.
| Roenke Jr., H. Merrill | 1 | | 9.
| Roepp, Friedrich | 1 | | 10.
| Roerich, Nikolai, 1874-1947 | 1 |
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