Murdock, Jerald <br/><br/>
Discovering Algebra  An Ivestgative Approach 
Jerald Murdock 
 - 2nd Ed. 
 - USA   Key Cirriculam Press  2008 
 - xiv,668p.  Col:ill.  28cm. 
<br/><br/><label>ISBN: </label>978155959371 
<br/><br/><label>Dewey Class. No.: </label>512/  / MUR