Bibliography
http://orise.orau.gov/reacts/guide/define.htm
Radiation therapy- http://www.world-nuclear.org/info/Safety-and-Security/Radiation-and-Health/Nuclear-Radiation-and-Health-Effects/
Cancer society http://www.cancer.org/research/cancerfactsstatistics/cancerfactsfigures2013/index
Knight, Randall Dewey. Physics for Scientists and Engineers: A Strategic Approach. San Francisco: Pearson/Addison Wesley, 2008. Print.