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Roof movement study of mechanized retreating longwall operation, Lancashire no. 15 mine, Bakerton, Cambria County, Pa.

Published Year

• 1950-1959 (1)

Subject

• Longwall mining (1)
• Mine roof control (1) *

Author

• Barry, A. J. (1)
• Wojciechowski, J. J. (1) *

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