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Mining Methods and Costs at the Sunbright Limestone Mine, Foote Mineral Co., Sunbright, Va

Thaddeus B. EvansNils A. Eilertsen

出版	U.S. Department of the Interior, 1957
URL	http://books.google.com.hk/books?id=NYuxN7SvqN0C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN