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What do we know about the explosibility of coal dust in mines?
Studies of roof movement in coal mines.
Studies of roof movement in coal mines.
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Published Year
1920-1929 (1)
1930-1939 (1)
1940-1949 (1)
Subject
Coal mines and mining (3) *
Mine roof control (2)
Mine explosions (1)
Author
Greenwald, H. P. (3) *
Maize, Earl R. (2)
Thomas, Edward. (1)
