Search U.S. government technical reports digitized or harvested by TRAIL.
Device for sampling material carried by silt-bearing streams
Blasting hazards in strip mines adjacent to underground workings
National first-aid and mine rescue contest,Louisville, Ky., October 2-4, 1957,
National first-aid and mine rescue contest, Buffalo, N. Y. October 5-7, 1959
Administration of the Federal Coal-Mine Safety Act, 1952-59
National first-aid and mine rescue contest, Charleston, W. Va., October 2-4, 1961