| Author | Titles | | 1.
| Pfeffer, Susanne | 1 | | 2.
| Pfeffer, W., 1845-1920 | 1 | | 3.
| Pfeffer, Wilhelm, 1845-1920 | 0 | | 4.
| Author is: Pfeffer, W., 1845-1920 | 1 | | 5.
| Pfeffer, Wilhelm Friedrich Philipp, 1845-1920 | 0 | | 6.
| Author is: Pfeffer, W., 1845-1920 | 1 | | 7.
| Pfeifer, Tadeus | 1 | | 8.
| Pfeiffer, Bruce Brooks | 7 | | 9.
| Pfeiffer, Édouard | 1 | | 10.
| Pfeiffer, Heinrich W. | 1 | | 11.
| Pfeiffer, Henri | 1 | | 12.
| Pfeiffer, Ingrid, 1966- | 5 |
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