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Oilfields in Mahoning, Columbiana, Carroll, Jefferson, and Harrison Counties, Ohio

Charles E. WhieldonC. I. Pierce

出版	U.S. Department of the Interior, Bureau of Mines, 1965
URL	http://books.google.com.hk/books?id=OAjoTenrnscC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN