Boyd, Happer W., Marketing research : text & cases / Happer W. Boyd, Ralph Westfall, Stanley F. Stasch. - 6th. edition - Homewood, Illinois : R.D. Irwin, 1985. - xv, 836 pages : illustrations ; 24 cm. Includes bibliographical references and index. ISBN: 0256031835 Subjects--Topical Terms: Marketing research--Case studies.