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Experimental longwall mining in a Pennsylvania anthracite mine (in two parts).
Properties of anthracite from the Bottom Ross bed
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Published Year
1960-1969 (2) *
Subject
Anthracite coal--Pennsylvania (2) *
Coal-mining machinery--Evaluation (1)
Longwall mining--Pennsylvania (1)
Mining machinery--Evaluation (1)
Author
Brady, George A. (1)
Brennan, Robert J. (1)
Griffiths, H. H. (1)
Malenka, Wilbert T. (1)
