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List of permissible mine equipment approved to January 1, 1940

List of permissible mine equipment approved to January 1, 1942

Hazards of black blasting powder in underground coal mining

Published Year

• 1940-1949 (3) *

Subject

• Coal mines and mining--Safety measures (3) *
• Explosives (3) *
• Mine explosions (1)

Author

• Ilsley, L. C. (2)
• Harrington, D. (1)
• Warncke, R. G. (1)

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