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"Water Treatment Solutions." Lenntech. Lenntech, n.d. Web. 22 May 2013. <http://www.lenntech.com/turbidity.htm>.
"Causes of Eutrophication." Kodu. N.p., n.d. Web. 22 May 2013. <http://kodu.ut.ee/~olli/eutr/html/htmlBook_4.html>.
"Causes of Eutrophication." Chemgym.net. N.p., n.d. Web. 22 May 2013. <http://legacy.chemgym.net/environmental_chemistry/topic_4b/page_2.html>.
"Fertilizers As Water Pollutants." FAO Corporate Document Repository. Natural Resources Management and Environmental Department. Web. 22 May 2013. <http://www.fao.org/docrep/w2598e/w2598e06.htm>.
"Toxic Substances Hydrology Program." USGS. US Department of Interior, 19 February 2013. Web. 22 May 2013. <http://toxics.usgs.gov/definitions/eutrophication.html>.
"How to Solve the Problem." Eutrophication and You. WordPress, n.d. Web. 20 May 2013. http://eutrophicationandyou.wordpress.com/how-to-solve-the-problem/>.
Cloern , James. "Eutrophication." The Encyclopedia of Earth. N.p., 08 Feb 2013. Web. 20 May 2013. <http://www.eoearth.org/article/Eutrophication>.
"Causes of Eutrophication." Kodu. N.p., n.d. Web. 22 May 2013. <http://kodu.ut.ee/~olli/eutr/html/htmlBook_4.html>.
"Causes of Eutrophication." Chemgym.net. N.p., n.d. Web. 22 May 2013. <http://legacy.chemgym.net/environmental_chemistry/topic_4b/page_2.html>.
"Fertilizers As Water Pollutants." FAO Corporate Document Repository. Natural Resources Management and Environmental Department. Web. 22 May 2013. <http://www.fao.org/docrep/w2598e/w2598e06.htm>.
"Toxic Substances Hydrology Program." USGS. US Department of Interior, 19 February 2013. Web. 22 May 2013. <http://toxics.usgs.gov/definitions/eutrophication.html>.
"How to Solve the Problem." Eutrophication and You. WordPress, n.d. Web. 20 May 2013. http://eutrophicationandyou.wordpress.com/how-to-solve-the-problem/>.
Cloern , James. "Eutrophication." The Encyclopedia of Earth. N.p., 08 Feb 2013. Web. 20 May 2013. <http://www.eoearth.org/article/Eutrophication>.