A geognostical essay on the superposition of rocks, in both hemispheres / By Alexandre de Humboldt. Translated from the original French.
- Alexander von Humboldt
- Date:
- 1823
Licence: Public Domain Mark
Credit: A geognostical essay on the superposition of rocks, in both hemispheres / By Alexandre de Humboldt. Translated from the original French. Source: Wellcome Collection.
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