Grolier international encyclopedia  volume 20: W-X-Y-Z/ 

 - Danbury, Connecticut:  Grolier Incorporated,  1994. 
 - 435 pages:  images; tables;  25 cm. 
<br/><br/> Includes Index. 
<br/><br/><label>ISBN: </label>0717296679 0717296873 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>031  / G894