Johnston, C. L.  <br/><br/>
Essential algebra. / C.L. Johnston, Alden T. Willis, Jeanne Lazaris.- 6th ed. 

 - 6E 
 - Belmont, Calif. : Wadsworth Pub. Co., c1991. 
<br/><br/><label>ISBN: </label>0534140041 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra
<br/><br/><label>Dewey Class. No.: </label>512 JOH