Home: Reference Desk: Encyclopedias 

Art Cyclopedia – Guide to fine art online
Columbia Encyclopedia – 51,000 entries with more than 80,000 cross links
Encyclopedia.com – Search over 100 resources
Encyclopedia of the Orient – Hundreds of topics covering over 20 countries
Encyclopedia Britannica –  FREE online, but the best stuff is only available with their premium subscriber service
Greek Mythology – An illustrated encyclopedia
Histor!ca – The Canadian Encyclopedia of Canadian history
How Stuff Works – Very useful for understanding physics and science (Owned by the same people as the Discovery Channel)
Wikipedia – Useful articles written by 'citizens', be careful to insure the material is well documented
Xrefer - A free site containing encyclopedias, dictionaries, thesauri & books of quotations. All cross-referenced

Of Interest:
Bartleby.com - A compilation of great works, useful in certain studies
Fact Monster - A kid friendly portal of information

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