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Open-pit Copper Mining Methods at New Cornelia Branch, Phelps Dodge Corp., Pima County, Ariz

William R. Hardwick

出版	U.S. Department of the Interior, Bureau of Mines, 1960
URL	http://books.google.com.hk/books?id=5jmkPictxxcC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN