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In situ tests of bearing capacity of roof and floor in selected bituminous coal mines :a program report - longwall mining

Injury experience in coal mining, 1967

Injury experience in coal mining, 1968

How to find abandoned oil and gas wells

Injury experience in coal mining, 1969

Methane emission from U.S. coal mines in 1973,a survey: a supplement to IC 8558

Methane emission from U.S. coal mines in 1975 :a survey : a supplement to Information circulars 8558 and 8659

Coal recovery from bituminous coal surface mines in the eastern United States :a survey

Coal recovery from underground bituminous coal mines in the United States, by mining method


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