| Author | Titles | 1.
| O'Sullivan, Maura | 1 | 2.
| O'Sullivan, Oscar | 1 | 3.
| O'Sullivan, Paul | 2 | 4.
| O'Sullivan, T. H., 1840-1882 | 0 | 5.
| Author is: O'Sullivan, Timothy H., 1840-1882 | 1 | 6.
| O'Sullivan, Timothy H., 1840-1882 | 1 | 7.
| O'Sullivan, William | 1 | 8.
| Osumi, Tamezo | 1 | 9.
| Osuna Gallery (Washington D. C., Estados Unidos) | 2 | 10.
| Osvald, Monika | 1 | 11.
| Oswald, F., 1866-1958 | 0 | 12.
| Author is: Oswald, Felix, 1866-1958 | 4 |
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