Freeman Bibliographical Database
| Identifier: | F1825 |
| Date: | 1862.12.30 |
| Concise reference: | Darwin, C. R. 1862. Penguin ducks. Journal of Horticulture and Cottage Gardener 3 (30 December): 797. |
| Identifier: | F1825 |
| Date: | 1862.12.30 |
| Concise reference: | Darwin, C. R. 1862. Penguin ducks. Journal of Horticulture and Cottage Gardener 3 (30 December): 797. |