Bibliography

McFarland, Kenneth [Internet] Botany 111 Fall 2013. [11/12/2013]. Available    from http://botany1112013.blogspot.com/

Patterson DJ. 1996. Free-living freshwater protozoa. 1st ed. New York. Amer Society for Microbiology.      124, 125, 153 pp.

Pennak Robert. 1978. Freshwater invertebrates of the united states. 2nd ed. New York. Ronald Press.  154-165 pp.