Freeman Bibliographical Database
| Identifier: | A5370 |
| Date: | 1860 |
| Concise reference: | Newton, Alfred. 1860. On some hybrid ducks. Proceedings of the Zoological Society of London 6: 336-339. [Darwin Pamphlet Collection] |
| Identifier: | A5370 |
| Date: | 1860 |
| Concise reference: | Newton, Alfred. 1860. On some hybrid ducks. Proceedings of the Zoological Society of London 6: 336-339. [Darwin Pamphlet Collection] |