Freeman Bibliographical Database
| Identifier: | A2553 |
| Date: | 1868 |
| Concise reference: | Anon. 1868. [Review of Variation]. Aves. Zoological Record, 5: 33; 58. |
| Identifier: | A2553 |
| Date: | 1868 |
| Concise reference: | Anon. 1868. [Review of Variation]. Aves. Zoological Record, 5: 33; 58. |