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Grade and Tonnage Model of Porphyry Copper Deposits in British Columbia, Canada, and Alaska, U.S.A.

W. D. MenzieD. A. Singer

出版	U.S. Geological Survey, 1993
URL	http://books.google.com.hk/books?id=Vy2KDAEACAAJ&hl=&source=gbs_api