Wallace Online Bibliographical Database
| Identifier: | S177 |
| Date: | 1870.12.08 |
| Concise reference: | Wallace, A. R. 1870. The difficulties of natural selection. Nature 3: 107. |
| Identifier: | S177 |
| Date: | 1870.12.08 |
| Concise reference: | Wallace, A. R. 1870. The difficulties of natural selection. Nature 3: 107. |