Freeman Bibliographical Database
| Identifier: | A900 |
| Date: | 1834 |
| Concise reference: | De La Beche, Henry Thomas. 1834. Researches in theoretical geology. London: Charles Knight |


| Identifier: | A900 |
| Date: | 1834 |
| Concise reference: | De La Beche, Henry Thomas. 1834. Researches in theoretical geology. London: Charles Knight |