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Basic estimated capital investment and operating costs for underground bituminous coal mines developed for longwall mining :mines with annual production of 1.5 and 3 million tons by longwall mining from an 84-inch coalbed

Published Year

• 1970-1979 (1)

Subject

• Bituminous coal (1)
• Coal mines and mining (1)

Author

• Duda, J. R. (1)
• Hemingway, E. L. (1) *

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