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Encyclopedia

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  1. Britannica Online Encyclopedia
    Provides information about britannica online encyclopedia.
    http://www.britannica.com/

  2. Encyclopaedia Britannica
    Provides information about encyclopaedia Britannica.
    http://www.eb.com/

  3. ExploreDC
    The official website of ExploreDC.
    http://www.exploredc.org/

  4. Healthopedia
    Provides information resource contains comprehensive and reliable database of health articles.
    http://www.healthopedia.com/

  5. World Book
    Offers simpler navigation, thousands of colorful illustrations, diagrams, and maps.
    http://www.worldbookonline.com

  6. World Book Encyclopedia
    Selling print encyclopedia in the world, and world book online encyclopedia.
    http://www.worldbook.com/

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