Willcutt, Robert E.  , Fraze, Patricia R. & Gardella, Francis J. <br/><br/>
Essential For Algebra : Concepts sand Skills 
By Robert E. Willcutt, Patricia R. Fraze & Francis J. Gradella 
 - Atlanta  Houghton Mifflin Company  1988 
 - vii, 515 pages, 23 cm. 
<br/><br/> include index 
<br/><br/><label>ISBN: </label>0-395-32223-5 
<br/><br/><label>Dewey Class. No.: </label>512 Es7