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Estimate of Known Recoverable Reserves of Coking Coal in Harlan County, Ky

Joseph J. WallaceJames J. DowdRaymond G. TravisR. F. AbernethyD. A. Reynolds

出版	U.S. Department of the Interior, Bureau of Mines., 1954
URL	http://books.google.com.hk/books?id=5pwLERPZ7V0C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN