Safety requirements for excavation, building, construction / War department, Corps of Engineers U.S. Army) occasional papers / the engineer school, united states army Historical sketch of the corps of engineers U.S. Army professional papers of the corps of engineers, u.s. army Report upon experiments and investigations to develop a system of submarine mines for defending the harbors of the United States / submitted to the Board … Safety requirements for excavation, building, construction / War department, Corps of Engineers U.S. Army annual reports / war department Report of the Chief of Engineers U.S. Army