The new book of knowledge 

 - Danbury, Conn. :  Scholastic Library Pub.,  2008 
 - 21 v. :  ill., maps ;  27 cm. 
<br/><br/>Includes bibliographical references and index 
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<br/><br/><label>ISBN: </label>9780717205424 (set 21 vol.)  RM104.76 0717205428 (set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's encyclopedias and dictionaries