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Experimental longwall mining in a Pennsylvania anthracite mine (in two parts).
Hydraulic mining of anthracite :analysis of operating variables
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Published Year
1960-1969 (2) *
Subject
Anthracite coal (1)
Anthracite coal--Pennsylvania (1)
Coal-mining machinery--Evaluation (1)
Hydraulic mining (1)
Longwall mining--Pennsylvania (1)
Mining machinery--Evaluation (1)
Author
Malenka, Wilbert T. (2) *
Brennan, Robert J. (1)
