貝爾 YOH-4 (Chinese Wikipedia)
Analysis of information sources in references of the Wikipedia article "貝爾 YOH-4" in Chinese language version.
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1000aircraftphotos.com
- Johan Visschedijk. Bell 206 JetRanger. 16 October 2003. （原始内容存档于September 14, 2006）.
archive.org
- Harding, Stephen. U.S. Army Aircraft Since 1947
. Atglen, PA, USA: Schiffer Publishing Ltd. 1997: 42. ISBN 978-0-933424-53-1.
georgespangenberg.com
- Spangenberg, George A. George A. Spangenberg Oral History 互联网档案馆的存檔，存档日期2008-09-10.. www.spangenberg.org. Judith Spangenberg-Currier, ed. pp.187-190. Accessed on 29 April 2008.
helicoptermuseum.org
- American Helicopter Museum: Bell 206 JetRanger. [2009-06-28]. （原始内容存档于2006-10-02）.
prohosting.com
fire.prohosting.com
- Beechy, Robert. "U.S Army Aircraft Acquisition Programs". 互联网档案馆的存檔，存档日期2006-11-18. Uncommon Aircraft 2006. 18 November 2005. Accessed on 19 September 2006.
rotormagazine.org
- Aastad, Andy. "The Introduction to the JetRanger". 互联网档案馆的存檔，存档日期September 10, 2008，. Rotor Magazine. Helicopter Association International. Winter 2006-2007. Accessed on 5 April 2009.
web.archive.org
- Johan Visschedijk. Bell 206 JetRanger. 16 October 2003. （原始内容存档于September 14, 2006）.
- Remington, Steve. "The Cessna CH-1 Helicopter". CollectAir.com
- Beechy, Robert. "U.S Army Aircraft Acquisition Programs". 互联网档案馆的存檔，存档日期2006-11-18. Uncommon Aircraft 2006. 18 November 2005. Accessed on 19 September 2006.
- Spangenberg, George A. George A. Spangenberg Oral History 互联网档案馆的存檔，存档日期2008-09-10.. www.spangenberg.org. Judith Spangenberg-Currier, ed. pp.187-190. Accessed on 29 April 2008.
- Aastad, Andy. "The Introduction to the JetRanger". 互联网档案馆的存檔，存档日期September 10, 2008，. Rotor Magazine. Helicopter Association International. Winter 2006-2007. Accessed on 5 April 2009.
- American Helicopter Museum: Bell 206 JetRanger. [2009-06-28]. （原始内容存档于2006-10-02）.