This primary source comes from the Records of the Office of the Chief of Engineers.
National Archives Identifier:
7419777Full Citation: Columbus High School Shelter Sign; 12/3/1962; Fallout Shelters/Civil Defense 5/5/60 - 1/22/63, 5/5/1960 - 1/22/1963; Construction Project Photographs , 1927 - 1981; Records of the Office of the Chief of Engineers, Record Group 77; National Archives at Boston (RE-BO), Waltham, MA. [Online Version, https://www.docsteach.org/documents/document/columbus-high-school-shelter-sign, May 12, 2024]