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Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Medina County, Ohio, Through Southwestern and South-central Pennsylvania to Hampshire County, West Virginia
Robert T. RyderAnita G. HarrisJohn E. RepetskiGeological Survey (U.S.)
出版U.S. Government Printing Office, 1992
URLhttp://books.google.com.hk/books?id=nK8xjnvSy6QC&hl=&source=gbs_api
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