The following sources were used in the makeing of this website:

http://www.newman.ac.uk/~k.james.smith/quiz5.html (author unknown)

http://www.aviation-central.com/famous/ab1g0.htm (author unknown)

http://www.thinkquest.org/library/lib/site_sum_outside.html?tname=19537&url=19537/java/Doppler.html sponsored by microsoft (author unknown)

http://www.glenbrook.k12.il.us/gbssci/phys/Class/sound/u11l2c.html © Tom Henderson, 1996-2001

http://aerodyn.org/HighSpeed/waves.html Copyright © A. Filippone (1999-2002). All Rights Reserved.
(VIEW COPYRIGHT)

http://www.grc.nasa.gov/WWW/K-12/airplane/short.html by Tom Benson

http://www.infoplease.com/ipa/A0004571.html © 2002 Family Education Network. All rights reserved. (author unknown)