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An analysis of the use of electricity at coal mines.

Published Year

• 1940-1949 (1)

Subject

• Coal mines and mining--Equipment and supplies (1)
• Coal-handling machinery (1) *

Author

• Jones, Frank A. (1)
• Maize, Earl R. (1) *
• Thomas, Edward. (1)
• Toenges, Albert L. (1)

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