Aufmann, Richard. algebra / Beginning and Intermediate Richard Aufmann, Richard Nation. - 1st ed. - Boston, MA : Houghton Mifflin Co., 2005. - Various pagings ill 28.2 cm ISBN: 0618391851 0618480978 (instructor's annotated ed.) LCCN: 2004109016 LC Class. No.: QA152.2 / AUF 2005