Freeman Bibliographical Database
| Identifier: | A3909 |
| Date: | 1857 |
| Concise reference: | Dana, James Dwight. 1857. Thoughts on species. American Journal of Science and Arts 2d ser. 24: 305-316. [Darwin Pamphlet Collection] |


| Identifier: | A3909 |
| Date: | 1857 |
| Concise reference: | Dana, James Dwight. 1857. Thoughts on species. American Journal of Science and Arts 2d ser. 24: 305-316. [Darwin Pamphlet Collection] |