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Canadian Base Metal Mining in the 1970's

D. G. F. Hedley

出版	CANMET, Energy, Mines and Resources Canada, 1978
URL	http://books.google.com.hk/books?id=3saIwwEACAAJ&hl=&source=gbs_api

註釋

"The Canadian base metal mining industry in the 1970's is examined to determine the source of production, mining method used, number and size of mines, employment figures, costs, and productivity"--Abstract, p. i.