The World Book encyclopedia. 

 - Chicago :   World Book,   c1993. 
 - 22 v. :   ill. (some col.), col. maps ;   26 cm. 
<br/><br/>  Spine title: World book. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0716600935 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Encyclopedias and dictionaries
<br/><br/><label>Dewey Class. No.: </label>031