| Author | Titles | | 1.
| Ruís, Leocádio | 1 | | 2.
| Ruisdael, Jacob Isaakszoom, 1629-1682 | 1 | | 3.
| Ruisdael, Jacob van, 1628?-1682 | 1 | | 4.
| Ruiter, Paul de, 19--?- | 1 | | 5.
| Ruival, Maria Julieta | 10 | | 6.
| Ruivo | 1 | | 7.
| Ruivo, 1935-2020 | 0 | | 8.
| Author is: Ruivo, Henrique, 1935-2020 | 14 | | 9.
| Ruivo, A., 1944- | 1 | | 10.
| Ruivo, Ana, 1971- | 30 | | 11.
| Ruivo, Ana Madalena Barros, 1971- | 0 | | 12.
| Author is: Ruivo, Ana, 1971- | 30 |
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