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Methods and Costs of Mining and Crushing Gypsum at the Mine of the Ebsary Gypsum Co., Inc., Wheatland, N.Y.

Edwin John Lintner

出版	U.S. Department of the Interior, Bureau of Mines, 1937
URL	http://books.google.com.hk/books?id=h7IxAaI6t2YC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN