Worldbook Online Encyclopedia
Updated regularly
The premier online reference source--containing every article from the 22-volume print set plus thousands more. With state-of-the art multimedia, editor-reviewed Web sites, and more!
World Book Research Libraries: Primary and core source collections--books, documents, selections--in major subject areas.
Enciclopedia Estudiantil Hallazgos: Basic Spanish-language encyclopedia for elementary and middle grades.
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