Willis, Alden T <br/><br/>
Elementary algebra / 
Alden T. Willis, Carol L. Johnston, Mary Jo Steig. 
 - Belmont, California :  Wadsworth Publishing,  c1987. 
 - x, 388 p. :  ill. ;  25 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0534079326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra.
<br/><br/><label>LC Class. No.: </label>QA152.2  / .W55 1987