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Directory of Known Mining Enterprises, 1959
Eugene Sheridan Perry
Frank A. Crowley
Montana Bureau of Mines and Geology
Robert N. Roby
Uuno Mathias Sahinen
Ralph Irvin Smith
D. C. Lawson
其他書名
With List of Active Coal Mines, 1959, and a Section on the Mineral Industry of Montana in 1959
出版
Montana School of Mines
, 1959
URL
http://books.google.com.hk/books?id=GyRSAQAAMAAJ&hl=&source=gbs_api