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Oil and Gas Fields of Greene County, Pa., by Ralph W. Stone and Frederick G. Clapp. [U.S. Geological Survey Bulletin No. 304. Series A, Economic Geology, 88. Series B, Descriptive Geology, 10.].

Ralph Walter StoneUnited States. Congress. House

出版	U.S. Government Printing Office, 1907
URL	http://books.google.com.hk/books?id=271IQwAACAAJ&hl=&source=gbs_api