This primary source comes from the Records of the Bureau of Public Roads.
Full Citation: 30-N-48-1207-B; 1903 and 1948 Cadillacs; 10/11/1948; Transportation - Motor Vehicles - Historic; Historical Photograph Files, 1896 - 1963; Records of the Bureau of Public Roads, Record Group 30; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/1903-and-1948-cadillacs, November 9, 2024]