| Author | Titles | 1.
| Oeri, Jakob | 1 | 2.
| Oertel, Richard | 1 | 3.
| Oertel, Robert | 1 | 4.
| Oertmann, Paul | 1 | 5.
| Oertzen, K. L. von | 1 | 6.
| Oesch, Will A. | 1 | 7.
| Oesterreich, Traugott Konstantin | 1 | 8.
| Oesterreicher-Mollwo, Marianne | 1 | 9.
| Oetker, Brigitte | 2 | 10.
| Oetzman, Peter, 1978 - | 1 |
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