Romorantin Aerodrome - Building 1-A DH-4 Assembly
Air Service, United States Army
Air Service, United States Army via Series 1, Paris Headquarters and Supply Section, Volume 18 History of the Air Service Production Center No. 2 at Romorantin, Gorrell's History of the American Expeditionary Forces Air Service, 1917–1919, National Archives, Washington, D.C