Three parts: World Book Online Reference Center includes all the articles from the 22-volume print set, plus thousands more. The comprehensive site hosts more than 20,000 pictures, maps, videos, and sounds, plus a wealth of learning activities and educator tools. World Book Enciclopedia Estudiantil Hallazgos is organized so that students can find information quickly and easily. It includes more than 2,200 articles, 250 maps, 1,500 illustrations, and bilingual navigation. World Book Student Discovery Encyclopediaoffers simple navigation, easy-to-read articles, thousands of illustrations and engaging activities.
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