Handley, Bill    <br/><br/>
Speed mathematics :   secrets of lighting mental calculation /  
Bill Handley    
 - 3rd. ed.    
 - Australia :  Wrightbooks,   2008    
 - xi;307p. :  ill.;   23cm.    
<br/><br/><label>ISBN: </label>0731407814    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic--Study and teaching