References

Ashmead, W.H., Burroughs, J., Bush, K.J., Cardot, J., Coe, W.R., Curtis, E.S., Dall, W.H., Eisen, G., Emerson, B.K., Gilbert, G.K., Grinnell, G.B., Harriman, E.H., Merriam, C.H., Muir, J., Nutting, C.C., Rathburn, M.J., Robertson, A., Smithsonian Institutuion, Verrill, A.E., Washington Academy of Sciences. (1899). Alaska/ Harriman Alaska Expedition. New York, U.S.A., 70.

Baker, Frank Collins. (1911). The Lymnaidae of North and Middle America. The Chicago Academy, U.S.A. 20, 184-185.

Chapter 8: Freshwater Snails. Working paper no. P.337. Web. 07 Dec. 2011. <http://www.whoint/water_sanitation_health/resources/vector337to356.pdf>.

Club, Ottawa Field Naturalists. (1938). The Canadian Field Naturalist. Ottawa. 114.

Ghesquire, Stijn A.I. "Various Freshwater Snails." The Apple Snail (Ampullariidae) Website. Web. 07 Dec. 2011. <http://www.applesnail.net/content/snails_various.php>.

Johnson, Paul D. "Sustaining America's Aquatic Biodiversity - Freshwater Snail Biodiversity and Conservation - Home - Virginia Coopertive Extension." Publications and Educational Resources - Home - Virginia Coopertive Extension. Virginia Cooperative Extension. Web. 10 Dec. 2011. <http://pubs.ext.vt.edu/420/420-530/420-530.html>.

McKillop, W.B. (1993). The Canadian Field Naturalist. Ottawa. 192-195.

Hickman, C.P., Roberts, L.S., Kleen, S. L., Larson, A., Eisenhour, D. J. (2009). Animal        Diversity. McGraw Hill, U.S.A.

Lowe, Nancy. "Identification Guides and Checklists of Plants and Animals." Discover Life. Web. 06 Nov. 2011. <http://www.discoverlife.org/20/q>.

Michels, J. (1875). Science. New York, U.S.A. 520

Myers, P., Espinosa, R., Parr, C.S., Jones, T., Hammond, G.S., Dewey, T.A., (2006). The Animal Diversity Web (online). <http://animaldiversity.org.>.

Pip, Eva. (1985). The Nautilus. Melbourne, Florida. U.S.A. 56