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Multiple-shift mechanical mining in some bituminous-coal mines.

An analysis of the use of electricity at coal mines.

Published Year

• 1940-1949 (2)

Subject

• Coal mines and mining--Equipment and supplies (2) *
• Bituminous coal (1)
• Coal-handling machinery (1)

Author

• Maize, Earl R. (2) *
• Jones, Frank A. (1)
• Thomas, Edward. (1)
• Toenges, Albert L. (1)
• Toenges, Albert L.. (1)

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