Freeman Bibliographical Database
| Identifier: | A6644 |
| Date: | 1868 |
| Concise reference: | Huxley, Thomas Henry. 1868. [Letter on the classification of birds.] Ibis 4: 357-362. [Darwin Pamphlet Collection 502] |
| Identifier: | A6644 |
| Date: | 1868 |
| Concise reference: | Huxley, Thomas Henry. 1868. [Letter on the classification of birds.] Ibis 4: 357-362. [Darwin Pamphlet Collection 502] |