Links

History

This is one of the best all around sites that I have found. It is titled "The MacTutor History of Mathematics Archive."
http://www-history.mcs.st-and.ac.uk/~history/

This is an award-winning site that links to all sorts of mathematics information.
http://archives.math.utk.edu/

Reference Topics

An excellent source can be found on the website of the Mathematical Association of America. It discusses the U.S. Constitution and its apportionment paradoxes. If you are having trouble with this material, this is a "must see" site.
http://www.maa.org/editorial/knot/Democracy.html

This site reviews apportionment paradoxes.
http://www.cut-the-knot.org/ctk/Democracy.shtml