| Author | Titles | 1.
| O'Donnell, Joe | 1 | 2.
| O'Donnell, Patrick, Padre | 1 | 3.
| O'Donnell, Roderick | 1 | 4.
| O'Donoghue, M. J. | 1 | 5.
| O'Donovan, Maureen | 1 | 6.
| Odriozola, Iker | 1 | 7.
| O'Driscoll, Angela | 1 | 8.
| Odul, Pascal | 1 | 9.
| Odum, Eugene P., 1913- | 7 | 10.
| Oechsli, Christopher G. | 1 |
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