The world book encyclopedia volume 21 

 - Chicago  World book  2009 
 - 610 p  col.ill.  26 cm 
<br/><br/><label>ISBN: </label>9780716601098 
<br/><br/><label>Standard Tech. Report. No.: </label>
<br/><br/><label>LC Class. No.: </label>R 031 WORL 
<br/><br/><label>Dewey Class. No.: </label>R 031 WORL