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The Principles and Practice of Sampling Metallic Metallurgical Materials with Special Reference to the Sampling of Copper Bullion

Edward Keller

出版	U.S. Government Printing Office, 1916
URL	http://books.google.com.hk/books?id=lUbXBBdh3zIC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN