Freeman Bibliographical Database
| Identifier: | F1900.11 |
| Date: | 1999 |
| Concise reference: | Burkhardt, F., D. Porter et al eds. 1999. The correspondence of Charles Darwin. Cambridge: Cambridge University Press. vol. 11: 1863. |
| Identifier: | F1900.11 |
| Date: | 1999 |
| Concise reference: | Burkhardt, F., D. Porter et al eds. 1999. The correspondence of Charles Darwin. Cambridge: Cambridge University Press. vol. 11: 1863. |