View source for Willoughby, 1909, The Willoughby aeroplane

{{Publication
|Original title=The Willoughby aeroplane
|Simple title=The Willoughby aeroplane
|Authors=
|Date=1909-10
|Countries=US
|Languages=en
|Keywords=Willoughby biplane; Hugh L. Willoughby; biplane; Willoughby War Hawk; airplane
|Journal=Amer. Aer.
|Related to aircraft=1
}}
=== Sources ===
* [[Brockett (1921)]], page [https://archive.org/details/bibliographyofa190916broc/page/1426 1426], entry 2: Willoughby, Hugh L. The Willoughby aeroplane.  Amer. Aer., Vol. 1, No. 3 (Oct. 1909), New York, p. 133. (B2p1426e02)