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Mining statutes of the state of Pennsylvania(summarized)
Mining anthracite without roof-fall accidents at Colonial Colliery, Colonia Colliery Co., Natalie, Pa.
Ventilation at the anthracite collieries of the northern Pennsylvania field
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Published Year
1930-1939 (3) *
Subject
Anthracite coal--Pennsylvania (3) *
Bituminous coal--Pennsylvania (1)
Coal mines and mining--Pennsylvania (1)
Coal mines and mining--Safety measures--Pennsylvania (1)
Mine safety--Pennsylvania (1)
Mine ventilation (1)
Mining law--Pennsylvania (1)
Author
Currie, R. D. (1)
Huff, J. A. (1)
McElroy, G. E. (1)