Freeman Bibliographical Database
| Identifier: | F621 |
| Date: | 1972 |
| Concise reference: | Darwin, C. R. 1972. The origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. New York: Collier. |
| Detailed reference: | 621. 1972 New York, Collier. As F615. Sixth printing. |