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Site Listings: Aircraft.co.za Aircraft.co.za boasts an aircraft encyclopedia, aviation calendar, timeline, glossary, company listings section and an aviation forum Bartleby.com Online publication of the Columbia Encyclopedia, Sixth Edition. Britannica.com Lets users simultaneously search the world's most respected encyclopedia, expert reviews of the Web's best sites, and timely articles from leading magazines. Encarta Encyclopedia The home for the Encarta Concise Encyclopedia. Encyclopedia Smithsonian Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z. Encyclopedia.com Free encyclopedia. EncycloZine EncycloZine is a hybrid portal / concise encyclopedia, with fun interactivities for learning and exercising the mind. Freeality Encyclopedias A collection of on-line encyclopedias. Information Please One of the largest free reference sites. Prominent People The site contains the details of prominent people all over the world of all walks of life over many centuries. The Thain's Book Descriptions of the people, places and things of Tolkien's Middle-earth in The Hobbit and The Lord of the Rings.