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Mine water control program, anthracite region of Pennsylvania : July 1955-December 1961
Developing a lock-hopper feeder for hydraulic hoisting of coal
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Published Year
1960-1969 (2)
Subject
Anthracite coal industry--Pennsylvania (1)
Coal-mining machinery (1)
Mine water (1)
Author
Dierks, Henry A. (2) *
Eaton, W. L. (1)
Link, H. B. (1)
Moyer, F. T. (1)
Whaote, R. H. (1)
