Tham khảo Ryan_YO-51_Dragonfly

Chú thích
  1. ↑ Donald 1997, p.794.
Tài liệu
  • Adcock, Al (2005). US Liaison Aircraft in action. Aircraft in Action. 195. Carrollton, TX: Squadron/Signal Publications. ISBN 978-0897474870.
  • Donald, David (1997). Complete Encyclopedia of World Aircraft. London: Orbis Publishing Ltd. ISBN 978-0760705925 Kiểm tra giá trị |isbn=: giá trị tổng kiểm (trợ giúp).
  • Fowler, Harlan Davey (1948). Fowler Flaps for Airplanes: An engineering handbook. Los Angeles: Wetzel Publishing Co. ASIN B0007EA17Q.
  • Merriam, Ray biên tập (2002). World War II Journal #15: U.S. Military Aircraft of World War II. Bennington, VT: Merriam Press. ISBN 978-1576381676 Kiểm tra giá trị |isbn=: giá trị tổng kiểm (trợ giúp).
  • Pattillo, Donald M. (2001). Pushing the Envelope: The American Aircraft Industry. Ann Arbor, MI: University of Michigan Press. ISBN 978-0472086719.
  • Penfield, Thomas (1941). Wings for America: Fighting Planes of the U. S. A. Chicago: Rand McNally & Co. ASIN B004BVUSC4.
  • Rowe, Frank Joseph (2006). The Helio Courier Ultra C/stol Aircraft: An Illustrated Developmental History. Jefferson, NC: McFarland & Company. ISBN 978-0786422890.