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Exploration of the Blue Metal Corundum Property, Douglas County, Nev

Eugene O. Binyon

出版	U.S. Department of the Interior, Bureau of Mines, 1946
URL	http://books.google.com.hk/books?id=H7GyhTg8Qs8C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN