Sources
-, "Latest in Bird Planes," Pathé Newsreel, January 14, 1932
-, Morristown, NJ Daily Record, Sept. 20, 1932
-, The New York Times, July 9, 10, 1932
-, The New York Times, Sept. 21, 1932
-, The New York Times, Oct. 5, 1932
-, The New York Times, Dec. 14, 1932
-, "How the Gray Goose Flies," Paramount Newsreel, 1933
-, Baltimore Evening Sun, Aug. 19, 20, 1949
-, Baltimore Sun, Aug. 20, 21, 1949
-, Baltimore News Post, Aug. 20, 1949
-, Newark, NJ Star-Ledger, Aug. 20, 1949
-, Newark, NJ Sunday Star-Ledger, Aug. 21, 1949
-, The New York Times, Aug. 21, 1949
-, Washington, DC Evening Star, Aug. 19, 20, 21, 1949
Caldwell, J. E., U. S. Patent 1,640,645, Aug. 30, 1927, "Aeroplane"
Caldwell, J. E., U. S. Patent 1,730,758, Oct. 8, 1929, "Airplane"
Moore, William L., "The Great UFO Con Game," Far Out! , Winter 1992
Scully, Frank, "Behind the Flying Saucers," 1950
Shalett, Sidney, "What You Can Believe About the Flying Saucers," The Saturday Evening Post, Apr. 30, May 7, 1949
Treuttner, L. H. and A. B. Deyarmond, Technical Report No. F-TR-2274-IA, Unidentified Aerial Objects Project 'Sign', Technical Intelligence Division, Air Materiel Command, US Air Force, February 1949
Except as noted, photos are courtesy of the Washington Star Collection, Martin Luther King Library, Washington, DC
The author wishes to thank Pearl S. Caldwell, John Caldwell and the Registrar's Office of Oregon State University, Corvallis for their assistance