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Basic estimated capital investment and operating costs for underground bituminous coal mines developed for longwall mining :mines with annual production 1.3 and 2.6 million tons by longwall mining from a 48-inch coalbed

Published Year

• 1970-1979 (1)

Subject

• Bituminous coal--Costs (1) *
• Coal mines and mining--United States--Cost of operation (1)

Author

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

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