Bibliography

“Canadian Shield.” Wikipedia, the Free Encyclopedia. Web. 04 Dec. 2011. http://en.wikipedia.org/wiki/Canadian_Shield.
“Great Lakes.” Wikipedia, the Free Encyclopedia. Web. 04 Dec. 2011. http://en.wikipedia.org/wiki/Great_Lakes.
“Coastal Plain.” Wikipedia, the Free Encyclopedia. Web. 04 Dec. 2011. http://en.wikipedia.org/wiki/Coastal_plain.
“Mississippi River.” Wikipedia, the Free Encyclopedia. Web. 04 Dec. 2011. http://en.wikipedia.org/wiki/Mississippi_River.
“Continental Divide of the Americas.” Wikipedia, the Free Encyclopedia. Web. 04 Dec. 2011. http://en.wikipedia.org/wiki/Continental_Divide_of_the_Americas.
“Continental Divide of the United States.” National Atlas Home Page. Web. 04 Dec. 2011. http://nationalatlas.gov/mld/condivl.html.
“History of the Mississippi River and Tributaries Project.” U.S. Army Corps of Engineers New Orleans District. Web. 04 Dec. 2011. http://www.mvn.usace.army.mil/pao/bro/misstrib.htm.

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