XL.—On the Composition of Chalk Rocks and Chalk Marl by invisible Organic Bodies : from the Observations of Dr. Ehrenberg
Article
1841
The Annals and magazine of natural history; zoology, botany, and geology
7
374--398
BioStor
London Taylor and Francis, Ltd
BioStor: https://biostor.org/reference/94418 DOI: https://doi.org/10.1080/03745484109442711
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