Search U.S. government technical reports digitized or harvested by TRAIL.
Methane emission from U.S. coal mines in 1973,a survey: a supplement to IC 8558
Hydraulic stimulation increases degasification rate of coalbeds
Commercial-quality gas from the multipurpose borehole located in the Pittsburgh coalbed
Longwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed