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Geology of the Otter Creek Quadrangle Montana

Arthur James BoucotJ. R. WilliamsJames Morton SchopfRoger Burnham ColtonTroy Lewis PéwéWillis Howard NelsonRobert A. GulbrandsenJoseph P. DobellRussell A. PaigeWilliam Albert Oliver

出版	U.S. Government Printing Office, 1949
URL	http://books.google.com.hk/books?id=0UJSAQAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Information required in describing coal beds, with a discussion of sampling methods and applications for coal geology.