Bibliography:
Pennak. Freshwater Invertebrates of the United States. New York (NY). Roland Press Company. 1953.
McFarland. Raven Biology of Plants. 2013.
Thorp, James H., and Covich, Alan P. Ecology and Classification of North American Freshwater Invertebrates. 3rd edition. Canada: Academic Press, 2010, Print.
McFarland, Kenneth [Internet] Botany 111 Fall 2013. [cited 23 October 2013]. Available from http://botany1112013.blogspot.com//
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