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Longwall Gob Degasification with Surface Ventilation Boreholes Above the Lower Kittanning Coalbed
Longwall Gob Degasification with Surface Ventilation Boreholes Above the Lower Kittanning CoalbedFred N. Kissell
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Fred N. Kissell
Longwall Gob Degasification with Surface Ventilation Boreholes Above the Lower Kittanning Coalbed

Longwall Gob Degasification with Surface Ventilation Boreholes Above the Lower Kittanning Coalbed

Fred N. Kissell, Maurice Deul, T. D. Moore
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