Freeman Bibliographical Database
| Identifier: | F358a |
| Date: | 1957 |
| Concise reference: | Darwin, C. R. and A. R. Wallace. On the Tendency of Species to form Varieties. In John Moore Principles of zoology. New York: Oxford University Press, pp. 344-358. |
| Detailed reference: | 358a 1957 New York, Oxford University Press. In John Moore Principles of zoology, pp. 344-358. |