Ball, Johnny. <br/><br/>
Think of a number / 
by Johnny Ball. 
 - London :  Dorling Kindersley,  2005. 
 - 96 p. :  illus ;  27 cm. 
<br/><br/><label>ISBN: </label>1405310316 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numbers--Juvenile literature.