Freeman Bibliographical Database
| Identifier: | F363 |
| Date: | 1964 |
| Concise reference: | Darwin, C. R. 1964. On the tendency of species to form varieties, in Bern Dibner, Darwin of the Beagle. New York: Blaisdell. |
| Detailed reference: | 363. 1964 New York, Blaisdell. in Bern Dibner Darwin of the Beagle, ix+143 pp. |