Freeman Bibliographical Database
| Identifier: | A3876 |
| Date: | 1868 |
| Concise reference: | Croll, James. 1868. On geological time, and the probable date of the Glacial and the Upper Miocene Period. Philosophical Magazine 4th ser. 35: 363-384; 36: 141-154, 362-386. [Darwin Pamphlet Collection] |