Freeman Bibliographical Database
| Identifier: | A7007 |
| Date: | 1874 |
| Concise reference: | Allen, Joel Asaph. 1874. On geographical variation in color among North American squirrels; with a list of the species and varieties of the American Sciuridae occurring north of Mexico. Proceedings of the Boston Society of Natural History 16: 276-294. [Darwin Library-CUL] |