Search U.S. government technical reports digitized or harvested by TRAIL.
A computer program for the stereographic analysis of coal fractures and cleats
A continuous-recording methanometer for exhaust fan monitoring
Methane emissions from an advancing coal mine section in the Pittsburgh coalbed
Methane emissions from four working places in the Beckley mine, Raleigh County, W. Va.
A fail-safe control system for a mine methane pipeline
Determination of geologic features associated with linears
A guide to geologic features in coal mines in the northern Appalachian coal basin
Prediction of surface deformations over longwall panels in the Northern Appalachian coalfield
Subsidence due to undermining of sloping terrain :a case study