Cambrian and Ordovician

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Description	volume 7 of the book series Maryland geological survey
Author/s	author: Maryland Geological Survey Ray Smith Bassler
Publication date	1919
Language	English
Country of origin	United States
Wikipedia link
Access work	https://archive.org/details/cambrianordovici00maryrich http://nrs.harvard.edu/urn-3:HUL.FIG.GITEM:32044055565345
Copyright status	public domain in United States.
Missing/wrong data?	Edit Wikidata item

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