| Autor | Títulos | 1.
| Obrist, Barbara | 1 | 2.
| Obrist, H. U., 1968- | 0 | 3.
| Ver: Obrist, Hans-Ulrich, 1968- | 66 | 4.
| Obrist, Hans Ulrich, 1968- | 0 | 5.
| Ver: Obrist, Hans-Ulrich, 1968- | 66 | 6.
| Obrist, Hans-Ulrich, 1968- | 66 | 7.
| Obrist, Marco | 2 | 8.
| Obrist, Ulrich, 1986- | 0 | 9.
| Ver: Obrist, Hans-Ulrich, 1968- | 66 | 10.
| Obrist, Ulrich Hans, 1968- | 0 | 11.
| Ver: Obrist, Hans-Ulrich, 1968- | 66 | 12.
| Obroutchev, V. | 1 | 13.
| Obry, Olga | 1 | 14.
| Observatório Astronómico de Lisboa (Portugal) | 1 |
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