Freeman Bibliographical Database
| Identifier: | A3845 |
| Date: | 1868 |
| Concise reference: | Cope, Edward Drinker. 1868. On the origin of genera. Proceedings of the Academy of Natural Sciences in Philadelphia 20: 242-300. [Darwin Pamphlet Collection] |
| Identifier: | A3845 |
| Date: | 1868 |
| Concise reference: | Cope, Edward Drinker. 1868. On the origin of genera. Proceedings of the Academy of Natural Sciences in Philadelphia 20: 242-300. [Darwin Pamphlet Collection] |