This primary source comes from the Records of the National Archives and Records Administration.
Full Citation: 64-S-A-1; Constitution Avenue Side of National Archives Building; ca. 1952; Photographs of the National Archives Building, ca. 1947–1964; Records of the National Archives and Records Administration, Record Group 64; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/constitution-avenue-side-of-national-archives-building, May 9, 2024]