Tuesday, October 18, 2011

Bibliography

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           York: John Wiley and Sons Inc; 1981.
Rainis G Kenneth, Russell J Bruce. Guide to Microlife. Danbury (CT): A Division of Grolier Publishing;
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Smith G Douglas. Freshwater invertebrates of the United States. 4th ed. New York: John Wiley and Sons
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Smith M Gilbert. Freshwater Algae of the United States. 2nd ed. New York: McGraw-Hill Book
           Company; 1950.
Ultricularia Gibba L. Digital image. Plants Profile. USDA Natural Resources Conservation Services.
           Web. 16 Nov. 2011. 
Ward B Henry, Whipple C George. Fresh-Water Biology. Boston (USA): FH Gilson Company; 1918.

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