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ODS Search (U.N.)Official documents of the United Nations, issued 1993 to present.
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Opposing Viewpoints in ContextSee Gale in Context: Opposing Viewpoints
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Oxford Art OnlineIncludes Grove Dictionary of Art; The Oxford Companion to Western Art; Encyclopedia of Aesthetics; The Concise Oxford Dictionary of Art Terms. 3 simultaneous users.
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Oxford English DictionaryEnglish language dictionary on historical principles.