Grolier academic encyclopedia  volume 14: N-O/ 

 - United States of America:  Grolier International,  1994 
 - 480 pages:  colored images, figures;  26 cm. 
<br/><br/><label>ISBN: </label>0717220559 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>031  / G894