Wilbur and Orville Wright: Inventors of Airplane.
[http://library.thinkquest.org/16541/eng/learn/library/content/airplane.htm]
National Aeronautics and Space Administration: Airplane Parts and Definitions. [http://www.grc.nasa.gov/WWW/K-12/airplane/airplane.html]
The Boeing Company: Boeing Commercial Airplanes and the Environment. Pioneering New Technologies.
[http://www.boeing.com/commercial/environment/technologies.html]
