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Drainage of methane from the overlying Pocahontas no. 4 coalbed from workings in the Pocahontas no. 3 coalbed
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Published Year
1970-1979 (1)
Subject
Coal mines and mining (1) *
Methane (1)
Mine ventilation (1)
Author
Cervik, Joseph, (1)
Finfinger, Gerald L. (1) *
