Freeman Bibliographical Database
| Identifier: | F1952 |
| Date: | 1881 |
| Concise reference: | Darwin, C. R. 1881. [Letter on subsidence in the Pacific]. In Semper, Karl, The natural conditions of existence as they affect animal life. London: Kegan Paul. |
| Identifier: | F1952 |
| Date: | 1881 |
| Concise reference: | Darwin, C. R. 1881. [Letter on subsidence in the Pacific]. In Semper, Karl, The natural conditions of existence as they affect animal life. London: Kegan Paul. |