Bibliography

Works Cited

Penn

Pennak, RW. 1989. Fresh-water invertebrates of the United States. 3rd ed. New York (NY): 
               John Wiley and Sons Inc. 628 p.

PAT   Patterson DJ. 1982. Free-living invertebrates protozoa. Washington DC: ASM Press. 223p.

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