Freeman Bibliographical Database
| Identifier: | F357 |
| Date: | 1957 |
| Concise reference: | Darwin, C. R. 1957. On the tendency of species to form varieties. In The Darwin reader (No. F1613). pp. 103-119. London: Macmillan. |
| Detailed reference: | 357. 1957 London, Macmillan. In The Darwin reader (No. 1614). As F337. [no |