Sources
Lorenz, Ralph. Spinning Flight: Dynamics of Frisbees, Boomerangs,
Samaras, and Skipping Stones. New York: Springer, 2006. 169-96. Print.
Bauer, Wolfgang. University Physics: with Modern Physics. 1st. New
York: McGraw-Hill, 2011. 434-38. Print.
http://www.frolfthemovie.com/
http://www.alliancewake.com/wake/lets-frolf/
http://stlouis.metromix.com/events/essay_photo_gallery/best-frisbee-golf-courses/1908138/content
http://www.rcaeronautics4dodos.filipinovegetarianrecipe.com/how_helicopters_fly.htm
http://www.blazelabs.com/l-project.asp
http://illumin.usc.edu/article.print.php?articleID=112
http://inventors.about.com/library/weekly/aa980218.htm
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=%22disc+golf+course%22+alaska&vps=6&sll=57.704147,-130.693359&sspn=22.686837,66.621094&ie=UTF8&hq=%22disc+golf+courses%22&hnear=Alaska