Scholarly Articles:
*Baker, F.C. 1945. The Molluscan Family Planorbidae. University of Illinois Press, Urbana. 1-xxxvi, 1-530 pls.
*Burch, J.B. 1982. North American Fresh Water Snails. Museum of Zoology and Department of Ecology and Evolutionary Biology. 1982:258-284.
*Curteanu, M.M., R.C. David. 2004. Survey of Aquatic Gastropods in the Central Parkland Subregion of Alberta. AlbertaSustainable Resource Development. 2004: 35.
*Hickman, C.P., L.S. Roberts, S.L. Keen, A. Larson, D.J. Eisenhour.2009. Animal Diversity. MccGraw Hill Higher Education. 2009: 425-445.
*Lysne,Steve. 2009. A Guide to Idaho’s Freshwater Mollusks. US Fish and Wildlife Service. 2009: 24.
*Nordstrom, Wayne. 2003. Mollusc Records Form. Alberta Natural Heritage Information Centre. Page 6.
*Thomsen, F.G. An Identification Manual for the Freshwater Snails of Florida. Florida Museum of Natural History. Gainesville, Florida, USA.

*Apple Snails. <URL:>. Accessed 28 October 2011.
*Cabrillo College. 2011. <URL: >. Accessed 1 November 2011.
*Ecology Letters. <URL: >. Accessed November 1 2011.
*Encyclopedia of Life. Vol. 2: <URL:>. Accessed 1 November 2011.
*Esker Lake Provincial Park. 2010.>. Accessed 1 November 2011.
*Montana Field Guides 2011.>. Accessed 13 October 2011.
*Washington State University Tri-Cities Natural History Museum. 2008.>. Accessed 13 October 2011.


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