"Ruth Merttens and David Kirkby" <br/><br/>
Abacus Evolve Textbook I 3 

 -  Maltivista Global ltd  2007 
 - 80 
<br/><br/><label>ISBN: </label>9780602575144 
<br/><br/><label>Dewey Class. No.: </label>510  / 2015