| Autor | Títulos | 1.
| Spekman, Jan | 1 | 2.
| Speltz, Alexander | 2 | 3.
| Spemann, Wilhelm | 1 | 4.
| Spence, Basil | 2 | 5.
| Spence, Charles Francis | 2 | 6.
| Spence, Godfrey | 1 | 7.
| Spence, Jo, 1934-1992 | 2 | 8.
| Spence, Joanna, 1934-1992 | 0 | 9.
| Ver: Spence, Jo, 1934-1992 | 2 | 10.
| Spence, Jonathan D. 1936- | 2 | 11.
| Spence, Lewis | 1 |
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