| Author | Titles | 1.
| Oman, Carles | 1 | 2.
| Oman, Carola Mary Anima | 1 | 3.
| Oman, Charles, 1860-1946 | 0 | 4.
| Author is: Oman, Charles William Chadwick, Sir, 1860-1946 | 6 | 5.
| Oman, Charles Chichele | 4 | 6.
| Oman, Charles William Chadwick | 3 | 7.
| Oman, Charles William Chadwick, Sir, 1860-1946 | 6 | 8.
| Oman, Giovanni | 1 | 9.
| Oman International Exhibition Centre (Muscat, Omã) | 1 | 10.
| Oman, Ron, 1970- | 1 | 11.
| Omar, Arthur, 1948- | 4 |
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