Algebra : a simplified approach 
Capitulo F.M. 
 -  National Book Store, Inc.  1989 
 - 516 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71084562-4 
<br/><br/><label>Dewey Class. No.: </label>F 512 C17a 1989