| Author | Titles | | 1.
| Spemann, Wilhelm | 1 | | 2.
| Spence, Basil | 2 | | 3.
| Spence, Charles Francis | 2 | | 4.
| Spence, Godfrey | 1 | | 5.
| Spence, Jo, 1934-1992 | 2 | | 6.
| Spence, Joanna, 1934-1992 | 0 | | 7.
| Author is: Spence, Jo, 1934-1992 | 2 | | 8.
| Spence, Jonathan D. 1936- | 2 | | 9.
| Spence, Lewis | 1 | | 10.
| Spencer, Charles | 2 | | 11.
| Spencer, Douglas | 1 |
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