The world book encyclopedia: volume 20 UV 

 - Chicago:  World book, Inc;  2018. 
 - 454 Pages:  Colour Illustrations;  25.50cm. 
 - World book .
<br/><br/><label>ISBN: </label>9780716601180 
<br/><br/><label>Dewey Class. No.: </label>R 031 WORL