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Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Morrow County, Ohio, to Pendleton County, West Virginia

Robert T. Ryder

出版	U.S. Government Printing Office, 1992
URL	http://books.google.com.hk/books?id=x4muDrbA6BAC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN