Columbia Encyclopedia
Columbia encyclopedia, sixth edition, 2001-07 at bartleby.com: the most up-to-date encyclopedia available on the web
http://www.bartleby.com/65/
Encyclopedia Britannica
Explore the updated online encyclopedia from encyclopaedia britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.
http://www.britannica.com/
Encyclopedia.com
Encyclopedia.com – our encyclopedia and online dictionary has pictures, facts, and videos. find millions of articles for information and homework help in our free online library.
http://www.encyclopedia.com/
Information Please
Information Please
http://www.infoplease.com/encyclopdict.html