Search U.S. government technical reports digitized or harvested by TRAIL.
Active list of permissible explosives and blasting devices approved prior to June 30, 1940
Active list of permissible explosives and blasting devices approved prior to June 30, 1941
Active list of permissible explosives and blasting devices approved prior to June 30, 1942
Active list of permissible explosives and blasting devices approved before December 31, 1951