Evolution of Political Parties - Stephen M. Merrill outlines the birth, evolution, and death of political parties in the United States from the colonial period to the Benjamin Harrison administration, including a brief glance at third parties. Searchable page images. [The North American - http://cdl.library.cornell.edu/cgi-bin/moa/moa-cgi?notisid=ABQ7578-0159-63
Why Third Parties? - Whether their candidates win or not, America's third political parties are important and here's why. Article examines the history of third parties and their impact. - http://usgovinfo.about.com/cs/politicalsystem/a/thirdparties.htm
Grolier Multimedia Encyclopedia: Progressive Party - Article for teens on the three twentieth-century parties that used this name. - http://ap.grolier.com/article?assetid=0236650-0&templatename=/article/article.html
Encyclopedia Americana: Progressive Party - Information on parties using this name led by Teddy Roosevelt, Robert LaFollette and Henry Wallace successively. - http://ap.grolier.com/article?assetid=0322300-00&templatename=/article/article.html
Constitutional Union Party - Information on the party formed for the 1860 elections. - http://ap.grolier.com/article?assetid=0106240-00&templatename=/article/article.html
Anti-Masonic Party - History of the faction which later helped form the Whig Party. - http://ap.grolier.com/article?assetid=0017460-00&templatename=/article/article.html
The History of Political Parties - Guide to articles on the web about the different parties that rose and fell over time including the third parties that never 'made it.' - http://americanhistory.about.com/cs/politicalparties/
Historical Election Results - Presidential election results from 1789 to the present. - http://gi.grolier.com/presidents/results/results.html