Llewellyn, S. <br/><br/>
Mathematics:  the basic skills / 
by S. Llewellyn and A. Greer 
 - 5th ed. 
 - Great Britain :  Stanley Thornes Publishers Ltd,  2001. 
<br/><br/><label>ISBN: </label>0748725091 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>510