| Author | Titles | | 1.
| Ossona, Paulina | 1 | | 2.
| Ossorio, Vega, 1945- | 1 | | 3.
| Ossowski, Stanislaw | 1 | | 4.
| Ossvald, Maria Henriques | 3 | | 5.
| Osswald, Cristina | 1 | | 6.
| Osswald, José | 1 | | 7.
| Osswald, Maria Cristina | 3 | | 8.
| Osswald, Maria de Castro Henriques, 1893-1988 | 2 | | 9.
| Osswald, Maria Helena | 1 | | 10.
| Osswald, Maria Henriques | 1 |
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