Tham khảo Thomas-Morse_XP-13_Viper

Ghi chú
  1. The Complete Book of Fighters Editors: William Green & Gordon Swanborough (Barnes & Noble Books New York, 1998, ISBN 0-7607-0904-1)
  2. "U.S. Army Aircraft 1908-1946" by James C. Fahey, 1946, 64pp.
  3. 1 2 3 Dorr and Donald 1990, p.43
Tài liệu
  • Dorr, Robert F. and David Donald. Fighters of the United States Air Force. London:Temple, 1990. ISBN 0-600-55094-X.
  • Gunston, Bill, World Encyclopedia of Aero Engines. London: Guild Publishing, 1986.