Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder System
Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder SystemFred N. Kissell
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Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder System

Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder System

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