Handley, Bill. , <br/><br/>
Speed mathematics :  secret of lightning mental calculation / 
Bill Handley. 
 - 2nd ed. 
 - xiii, 256 pages ;  23 cm. 
<br/><br/><label>ISBN: </label>070163765X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic.
<br/><br/><label>LC Class. No.: </label>QA111   / .H374 2003