Gatonye, Andrew O. et al. <br/><br/>
Progressive Primary Mathematics /  Pupils' Book 8. 

 - 2nd ed. 
 - Nairobi :  Oxford University Press.  2003. 
 - ill, 252p.  17cm. 
<br/><br/><label>ISBN: </label>9780195739602 
<br/><br/><label>Dewey Class. No.: </label>500.510