"PETER GASH" <br/><br/>
MATHS MADE EASY 

 - DELHI  ,LADYBIRD,DORLING,DORLING KINDERSLEY  1998 
 - 32 
<br/><br/><label>ISBN: </label>174033468X 
<br/><br/><label>Dewey Class. No.: </label>510  / 913