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Underground Mining Methods in Canada
D. G. F. Hedley
Minerals Research Program (Canada)
Mining Research Laboratories (Canada)
World Mining Congress (1976 : Dusseldorf, Germany)
出版
Mining Research Laboratories
, 1975
URL
http://books.google.com.hk/books?id=z5i_SgAACAAJ&hl=&source=gbs_api