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Mine rescue life-line telephone assemblies
Control of roof and prevention of accidents from falls of rock and coal
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Published Year
1940-1949 (2) *
Subject
Coal mines and mining--Safety measures (1)
Mine rescue work (1)
Mine roof control (1)
Mine safety--Equipment and supplies (1)
Author
Forbes, J. J. (2) *
Cash, F. E. (1)
Griffith, F. E. (1)
Petersen, Max S. (1)
Sloman, Harold J. (1)
