Penna, Judith A. <br/><br/>Elementary algebra:  concepts and applications/ Judith A. Penna.--  -- Third edition.  -- America:  Addison-Wesley Publishing Company, Inc.,  1990. <br/> ill.;  28. <br/><br/><label>ISBN: </label>0201173948 <br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra<br/><br/><label>Dewey Class. No.: </label>HS Cir 512.9 P381 1990