Encyclopedia Britannica Online, featuring the complete Encyclopedia Britannica, Britannica Concise Encyclopedia, Merriam-Webster's Dictionary & Thesaurus
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Free online encyclopedia - Search and browse 57,000 articles from the Columbia Encyclopedia and dig deeper with over 35 million articles from HighBeam Research
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The A.D.A.M. Medical Encyclopedia includes over 4,000 articles about diseases, tests, symptoms, injuries, and surgeries. It also contains an extensive library of medical photographs and illustrations.
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