Saunders, Graham D. <br/><br/>
Usborne Spotter's Guides / 
by Graham D. Sauders. 
 - London :  Usborne,  2006. 
 - 64 p. :  illus. , col ;  22 cm. 
<br/><br/><label>ISBN: </label>9780746073506 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shells.