Lucas, Jerry. <br/><br/>
Becoming a mental math wizard.. 

 - Virginia     Shoe Tree Press    1988 
 - 191p. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>372.7 LUC