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Mechanical mining in some bituminous-coal mines.

Estimate of known recoverable reserves of coking coal in Clearfield County, Pa.

Mechanical mining in some bituminous-coal mines.

Published Year

• 1950-1959 (3) *

Subject

• Bituminous coal industry--United States (2)
• Coal-mining machinery (2)
• Coal--Pennsylvania (1)
• Coking coal (1)

Author

• Dowd, J. J. (3) *
• Haley, W. A. (2)
• Shields, J. J. (2)
• Abernethy, R. F. (1) *
• Blaylock, D. W. (1)
• Magnuson, M. O. (1)
• Reynolds, D. A. (1)

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