Freeman Bibliographical Database
| Identifier: | A6302 |
| Date: | 1841 |
| Concise reference: | Weaver, Thomas. 1841. On the composition of chalk rocks and chalk marl by invisible organic bodies: from the observations of Dr. Ehrenberg. The London, Edinburgh and Dublin Philosophical Magazine 3d ser. 18(5): 375-397, 18(6): 443-464. [Darwin Pamphlet Collection] |