The Macmillan Family Encyclopedia, Vol.14 : N - O 

 - London  Macmillan Press  1991 
 - 480 p. 
<br/><br/> Bibliography, Illustrations, Maps; Photos 
<br/><br/><label>ISBN: </label>333557085 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopaedia<br/>General
<br/><br/><label>Dewey Class. No.: </label>R032  / MAC