| Concise reference: |
Darwin, C. R. 1989. The works of Charles Darwin, edited by Paul H. Barrett and R.B. Freeman, volume 21: The Descent of Man, and Selection in Relation to Sex; 2d ed, with an essay by T H Huxley (1877), Part 1. London: Pickering. |
| Detailed reference: |
Darwin, C. R. 1989. The works of Charles Darwin, edited by Paul H. Barrett and R. B. Freeman, volume 21: The Descent of Man, and Selection in Relation to Sex; second edition, with an essay by T H Huxley (1877), Part 1. London: Pickering, 236 pp. |
