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is the online equivalent of the most current edition of the McGraw-Hill Encyclopedia of Science & Technology, which also includes biographies of scientists, recent science-related news articles, study guides, and web site links.
includes the full-text content from over 850 encyclopedias and other reference books covering a broad range of subjects. There are over 3 million articles and 200,000+ images (art, diagrams, maps and photos).
Gale Virtual Reference Library
includes the full-text content from over 200 special topic encyclopedias and other reference books.