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  • Bartleby.com - Includes the Columbia Encyclopedia, Sixth Edition, dictionaries, and thesauri.
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  • Encyberpedia - Electronic encyclopedia with its own content as well as over 10,000 links to the best reference sites on the Internet.
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  • Encyclopaedia Britannica Online - Provides selected articles for free, full text with search capabilities, multimedia and related links for subscribers.
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  • Encyclopedia Smithsonian - Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z.
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  • HighBeam Encyclopedia - Offers articles from the Columbia Encyclopedia and Britannica Concise Encyclopedia.
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  • How Stuff Works - Articles explain how hundreds of things work, from elements of the human body to space-age technology.
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  • Hutchinson Encyclopedia - "A subset of the content (concise set) is provided for free, the access to the rest of the Hutchinson Encyclopedia requires subscription."
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  • Information Please - Online dictionary, Columbia Encyclopedia, and almanac reference.
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  • Nuttall Encyclop√¶dia of General Knowledge - Approximately 14,000 entries on topics including art, geography, literature, philosophy, religion. Originally published in 1907.
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  • Online Encyclopedia - Offers articles from on the 11th edition Encyclopedia Britannica, and from the Crystal Reference Encyclopedia. All articles are searchable and alphabetized.
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  • The Probert Encyclopaedia - Reference source with entries covering a broad variety of subjects.
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  • Simple English Wikipedia - User-contributed online encyclopedia intended for people whose first language is not English.
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  • World Book Encyclopedia - Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs. Requires free temporary registration with option to buy continued access for full articles.
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Last update: August 18, 2014 at 14:55:00 UTC - edit