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Some observations on coal-mine fans and coal-mine ventilation

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)

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