Benjamin, Arthur <br/><br/>
Secrets of mental math : the mathemagician's guide to lightning calculation and amazing math tricks 
Arthur Benjamin 
 - USA  Three Rivers Press  2006 
 - 278 p. 
<br/><br/><label>ISBN: </label>9780307338402 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental calculators
<br/><br/><label>Dewey Class. No.: </label>510