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Some coal-mine safety organizations in the Pennsylvania bituminous field
A ventilation study of the Graceton Coal & Coke Co. mine, Graceton, Pa.
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Published Year
1930-1939 (2)
Subject
Bituminous coal--Pennsylvania (1)
Coal miners--Pennsylvania (1)
Coal mines and mining--Pennsylvania--Safety measures (1)
Coal mines and mining--Safety measures (1)
Mine ventilation (1)
Author
Currie, Robert Dewey, (2) *
Maize, Earl R. (1)
