Search U.S. government technical reports digitized or harvested by TRAIL.
The use of dust respirators in coal mines
Review of dust-allaying practices at working faces in some bituminous-coal and lignite mines
Hazard of firing open, unconfined shots in coal mines
Technology of lignitic coals : in two parts ;
Technology of lignitic coals :in two parts ;
Cementation of bituminous-coal-mine roof strata.
Mining and transporting coal underground by hydraulic methods :a literature survey
Cementation of bituminous-coal-mine roof strata :injection of epoxy and polyester-type resins