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Core Drilling at Shaft Sites of Proposed Mine-water Drainage Tunnel, Anthracite Region of Pennsylvania, by S.H. Ash, R. Emmet Doherty, P.S. Miller, W.M. Romischer and J.D. Smith

S. H. AshR. Emmet DohertyP. S. MillerW. M. RomischerJ. D. SmithEtats-Unis. Mines (Bureau)

出版	U.S. Government Printing Office, 1952
URL	http://books.google.com.hk/books?id=OIjdtgAACAAJ&hl=&source=gbs_api