| Author | Titles | | 1.
| Osswald, Maria Cristina | 3 | | 2.
| Osswald, Maria de Castro Henriques, 1893-1988 | 2 | | 3.
| Osswald, Maria Helena | 1 | | 4.
| Osswald, Maria Henriques | 1 | | 5.
| Osswald, Maria Henriques, f1893-1988 | 1 | | 6.
| Osswald, Walter | 1 | | 7.
| Ostaijen, Paul van, 1896-1928 | 1 | | 8.
| O'Steen, Bobbie, 1952- | 1 | | 9.
| O'Steen, Sam, 1923 | 1 | | 10.
| Osten, Claus von der | 2 |
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