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Lighting practices in coal mines of the United States
Investigation of electrical equipment, safety lamps, and gas detectors for safety
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Published Year
1930-1939 (2) *
Subject
Mine lighting--Equipment and supplies (2) *
Coal mines and mining--Safety measures (1)
Gas detectors (1)
Mine lighting (1)
Mine safety--Equipment and supplies (1)
Safety lamps (1)
Author
Hooker, A. B. (1)
Ilsley, L. C. (1)
Owings, C. W. (1)
