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Recovering byproduct heavy minerals from sand and gravel, placer gold, and industrial mineral operations

John M. GomesGeorge M. MartinezMorton Min Wong

出版	Department of the Interior, Bureau of Mines, 1979
URL	http://books.google.com.hk/books?id=nuC9FfveLnMC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN