Freeman Bibliographical Database
| Identifier: | A4869 |
| Date: | 1855 |
| Concise reference: | Leidy, Joseph. 1855. A memoir on the extinct sloth tribe of North America. Washington: Smithsonian Institution. [Darwin Pamphlet Collection] |
| Identifier: | A4869 |
| Date: | 1855 |
| Concise reference: | Leidy, Joseph. 1855. A memoir on the extinct sloth tribe of North America. Washington: Smithsonian Institution. [Darwin Pamphlet Collection] |