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Some observations on coal-mine fans and coal-mine ventilation
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Published Year
1930-1939 (1)
Subject
Fans (Machinery) (1) *
Mine explosions (1)
Mine safety--United States (1)
Mine ventilation (1)
Mines and mineral resources--United States--Safety measures (1)
Author
Denny, E. H. (1) *
Harrington, D. (1)
