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Analyses of Pennsylvania bituminous coals :supplement to Technical Paper 590

Fire fighting facilities at four Pennsylvania bituminous-coal mines

Published Year

• 1940-1949 (2) *

Subject

• Bituminous coal--Pennsylvania (2) *
• Coal mines and mining--Pennsylvania--Safety measures (1)

Author

• Grove, G. W. (1)
• Simpson, O. V. (1)
• Snyder, Ned H. (1)
• Swingle, Robert Johnston, (1)

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