Working with math:  career explorations 4. 
Clark copp. 
 - Canada,  Pitman.  1992. 
 - 46p. 
<br/><br/><label>ISBN: </label>0-7730-5070-1 
<br/><br/><label>LC Class. No.: </label>HF 3882.5   / .C3C37 1992