Core refernce collections; documents, selections, online
reference books in major subject areas at the World Book
Online Reference Center.
World Book Online Reference Center
World
Book Online Reference Center:
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!
Primary and core source collections--books, documents,
selections--in major subject areas.
Basic
Spanish-language encyclopedia for elementary and
middle grades.
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