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Methane emission rate studies in a northern West Virginia mine

Air-sealing coal mines to reduce water pollution

Methane emission rate studies in a central Pennsylvania mine

Methane emission rate study in a deep Pocahontas No. 3 coalbed mine in conjunction with drilling degasification holes in the coalbed

Methane control by isolation of a major coal panel :Pittsburgh coalbed

Bleeder system in virgin area in a Pittsburgh coalbed mine


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