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Preparation Characteristics of Coal from Bell County, Ky

Donald Samuel KingeryJames W. MillerTheodore R. JolleyH. N. DunningJohn NagyMax Richard GeerVernon Frank ParryWilbur A. HaleyWilbur I. DuvallDavid E. WolfsonGeorge W. BirgeUnited States. Bureau of MinesJohn W. MooreThomas Calvin AtchisonD. D. DornenburgJames J. DowdRobert T. JohansenDonald W. MitchellBruce W. Naugle

出版	U.S. Department of the Interior, Bureau of Mines, 1957
URL	http://books.google.com.hk/books?id=ydfAKu-H1nUC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN