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http://blog.airdye.com/goodforwater/2009/05/12/forever-in-blue-jeans/
"May 2013." Discover Magazine. N.p., n.d. Web. 02 Apr. 2013. <http://discovermagazine.com/2003/feb/featfrogs>.
"Pollution Issues." Pesticides. N.p., n.d. Web. 02 Apr. 2013. <http://www.pollutionissues.com/Na-Ph/Pesticides.html>.
Fontaine, Cecil. "Harmful Effects of Factory Waste." EHow. Demand Media, 19 Apr. 2011. Web. 04 Apr. 2013.
http://blog.airdye.com/goodforwater/2009/05/12/forever-in-blue-jeans/