| Author | Titles | | 1.
| Protetch, Max | 1 | | 2.
| Proth, Mario | 1 | | 3.
| Prothero, George Walter | 1 | | 4.
| Protick, Sarker, 1986- | 1 | | 5.
| Prott, Lyndel V. | 1 | | 6.
| Prottengeier, Alvin E. | 1 | | 7.
| Protzman, Ferdinand | 1 | | 8.
| Prou, M. | 1 | | 9.
| Prou, Maurice, 1861-1930 | 2 | | 10.
| Proudhon, Pierre-Joseph, 1809-1865 | 7 |
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