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

Properties of anthracite from the Bottom Ross bed

Published Year

• 1960-1969 (2) *

Subject

• Anthracite coal--Pennsylvania (2) *
• Coal-mining machinery--Evaluation (1)
• Longwall mining--Pennsylvania (1)
• Mining machinery--Evaluation (1)

Author

• Brady, George A. (1)
• Brennan, Robert J. (1)
• Griffiths, H. H. (1)
• Malenka, Wilbert T. (1)

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