| Autor | Títulos | 1.
| ONUSIDA | 4 | 2.
| ONUUNCTAD | 2 | 3.
| Ooghe, E. | 0 | 4.
| Ver: Ooghe, Erwin | 1 | 5.
| Ooghe, Erwin | 1 | 6.
| Ooij, Eva van | 0 | 7.
| Ver: Van Ooij, E. C. | 1 | 8.
| Oom, Frederico | 0 | 9.
| Ver: Oom, Frederico, 1864-1930 | 2 | 10.
| Oom, Frederico, 1864-1930 | 2 | 11.
| Oom, Frederico Augusto | 0 | 12.
| Ver: Oom, Frederico Augusto, 1830-1890 | 1 | 13.
| Oom, Frederico Augusto, 1830-1890 | 1 | 14.
| Oom, Frederico Thomaz | 0 | 15.
| Ver: Oom, Frederico, 1864-1930 | 2 |
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