Barrier pillars in the Southern field :
anthracite region of Pennsylvania /
by S.H. Ash and H.D. Kynor.

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Main Author: Ash, S. H. (Simon Harry), 1889-
Related Names: Kynor, H. D.
Language(s): English
Published: Washington, D.C. : U.S. G.P.O., 1953.
Subjects: Anthracite coal > Anthracite coal / Pennsylvania.
Barrier pillars.
Note: Ten folded maps in pocket.
Physical Description: iv, 44 p. : ill., maps ; 26 cm.
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Full view no.526-535	The Ohio State University

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