The world book encyclopedia  : W-X-Y-Z 

 - London  ; World Book International  , 1997 
 - 510p.ill.  , V.21 
<br/><br/><label>ISBN: </label>0716666979  1472.04 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopaedia<br/>Encyclopaedia-Factbook
<br/><br/><label>Dewey Class. No.: </label>031.2  / ENC