Freeman Bibliographical Database
| Identifier: | F1900.12 |
| Date: | 2001 |
| Concise reference: | Burkhardt, F., D. Porter et al eds. 2001. The correspondence of Charles Darwin. Cambridge: Cambridge University Press. vol. 12: 1864. |
| Identifier: | F1900.12 |
| Date: | 2001 |
| Concise reference: | Burkhardt, F., D. Porter et al eds. 2001. The correspondence of Charles Darwin. Cambridge: Cambridge University Press. vol. 12: 1864. |