Hydroelectric power plants : Architectural design (June 1948) / Department of the Army. Office of the Chief of Engineers Hydroelectric power plants : General requirements (April 1948) / Department of the Army. Office of the Chief of Engineers Subsurface investigation : Geophysical explorations (September 1948) / Department of the Army. Office of the Chief of Engineers Foundation grouting : Equipement (April 1948) / Department of the Army. Office of the Chief of Engineers Wall design : Flood walls (January 1948) / Department of the Army. Office of the Chief of Engineers Subsurface investigations : Soils (March 1954) / Department of the Army. Office of the Chief of Engineers technical regulations Fortification : camouflage for artillery / prepared under direction of the Chief of Engineers technical regulations Fortification : explosives and demolitions / prepared under direction of the Chief of Engineers technical regulations Fortification : principles of field fortification / prepared under direction of the Chief of Engineers technical regulations Fortification : proctected shelters / prepared under direction of the Chief of Engineers technical regulations Fortification : standard types and execution of field fortifications / prepared under direction of the Chief of Engineers technical regulations Fortification : field fortification for artillery / prepared under direction of the Chief of Engineers