Handley, Bill. , <br/><br/>
Speed mathematics :  secret skills for quick calculation / 
Bill Handley. 
 - xiii, 256 pages :  illustrations ;  23 cm. 
<br/><br/><label>ISBN: </label>0471467316 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic.
<br/><br/><label>LC Class. No.: </label>QA111   / .H36 2003