Hirsch, Lewis. Understanding intermediate algebra / Lewis Hirsch, Arthur Goodman. - St. Paul : West Pub. Co., c1990. - xvii, 726 p. : ill. (some col.) ; 26 cm. ISBN: 0314284958 LCCN: 89022746 Subjects--Topical Terms: Algebra. LC Class. No.: QA152.2 / .H57 1990 Dewey Class. No.: 512.9