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State regulations pertaining to the use of internal-combustion engines in coal and metal mines and in tunnels

Published Year

• 1930-1939 (1)

Subject

• Internal combustion engines--Safety measures (1)
• Mine safety--United States (1)
• Tunnels--Safety measures (1) *

Author

• Gleim, E. J. (1)
• Ilsley, L. C. (1) *

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