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Falls of roof :the no. 1 killer in bituminous-coal mines

Published Year

• 1950-1959 (1)

Subject

• Bituminous coal industry--United States--Safety measures (1)
• Coal mines and mining--United States--Safety measures (1)
• Mine roof control--United States (1) *

Author

• Back, T. L. (1) *
• Forbes, J. J. (1)
• Weaver, H. F. (1)

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