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Why miners' portable electric lamps require safety devices
List of permissible mine equipment
List of permissible mine equipment
List of permissible mine equipment
List of permissible mine equipment
List of permissible mine equipment
List of permissible mine equipment approved during 1937
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Published Year
1920-1929 (1)
1930-1939 (6)
Subject
Mines and mineral resources--Equipment and supplies (7) *
Mining machinery (6)
Electric lamps, Portable (1)
Mines and mineral resources--Research (1)
Safety lamps (1)
Author
Ilsley, L. C. (7) *
