Search U.S. government technical reports digitized or harvested by TRAIL.
Quarrying near urban areas :an aid to premine planning
Mine power systems research(in four parts) :
Mine health and safety in-house research, development, and demonstration in fiscal year 1979
In-mine evaluation of underground fire and smoke detectors
Gas analysis procedures applicable to flue gas desulfurization by the citrate process
Citrate process demonstration plant design
Copper availability - domestic :a minerals availability system appraisal