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Experimental longwall mining in a Pennsylvania anthracite mine (in two parts).

Published Year

• 1960-1969 (1)

Subject

• Anthracite coal--Pennsylvania (1)
• Coal-mining machinery--Evaluation (1)
• Longwall mining--Pennsylvania (1)
• Mining machinery--Evaluation (1) *

Author

• Brennan, Robert J. (1)
• Malenka, Wilbert T. (1) *

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