Redigerer Airco DH 9.A (avsnitt)

==Referanser==
<references />

===Bibliografi===

* Alexandrov, Andrei and Gennady Petrov. "Aah! De Havilland-Ski!:Origins and Development of the R-1, the Soviet DH.9A". ''[[Air Enthusiast]]'', Number 74, March/April 1998. Stamford, UK: Key Publishing, pp.&nbsp;54–63. ISSN 0143-5450.
* Bowyer, Chaz. "de Havilland D.H.9A (RAF: 1918–30)". ''Aircraft in Profile, Volume 14''. Windsor, Berkshire, UK: Profile Publications Ltd., 1974, pp.&nbsp;25–49. {{ISBN|978-0-85383-023-8}}.
* Bruce, J.M. "[http://www.flightglobal.com/pdfarchive/view/1956/1956%20-%200641.html The De Havilland D.H.9A: Historic Military Aircraft No.13, Part I]". ''[[Flight International|Flight]]'', 25 May 1956, pp.&nbsp;641–644.
* Bruce, J.M. "[http://www.flightglobal.com/pdfarchive/view/1956/1956%20-%200677.html The De Havilland D.H.9A: Historic Military Aircraft No.13, Part II]". ''[[Flight International|Flight]]'', 1 June 1956, pp.&nbsp;677–680.
* Cornelisse, Diana G. ''Splendid Vision, Unswerving Purpose: Developing Air Power for the United States Air Force During the First Century of Powered Flight''. Wright-Patterson Air Force Base, Ohio: US Air Force Publications, 2002. {{ISBN|0-16-067599-5}}.
* Donald, David, ed. The Encyclopedia of World Aircraft. London: Aerospace Publishing, 1997. {{ISBN|1-85605-375-X}}.
* Gunston, Bill. ''The Osprey Encyclopedia of Russian Aircraft from 1875 – 1995''. London: Osprey Aerospace, 1995. {{ISBN|1-85532-405-9}}.
* Jackson, A.J. ''De Havilland Aircraft since 1909''. London: Putnam, Third edition, 1987. {{ISBN|0-85177-802-X}}.
* Mason, Francis K. ''The British Bomber since 1914''. London: Putnam Aeronautical Books, 1994. {{ISBN|0-85177-861-5}}.
* Thetford, Owen. "By Day and By Night: Part 3". ''Aeroplane Monthly'', Vol. 20, No. 8, Issue No. 232, August 1992, pp.&nbsp;16–22. London: IPC.  ISSN 0143-7240.
* Williams, George K. ''Biplanes and Bombsights: British Bombing in World War I''. Maxwell Air Force Base, Alabama: Air University Press, 1999. {{ISBN|1-41020-012-4}}.