Freeman Bibliographical Database
| Identifier: | A420 |
| Date: | 1902 |
| Concise reference: | Holst, Helge. 1902. Arternes Oprindelse IV - Pattedyrene. Vor Jord (32). |
| Identifier: | A420 |
| Date: | 1902 |
| Concise reference: | Holst, Helge. 1902. Arternes Oprindelse IV - Pattedyrene. Vor Jord (32). |