Boyd, Harper W. Marketing research; text and cases / Harper W. Boyd, Jr. and Ralph Westfall. - 3d ed. - Homewood, Ill. : R. D. Irwin, c1972. - xv, 813 p. : ill. ; 24 cm. Includes bibliographical references. LCCN: 70172964 Subjects--Topical Terms: Marketing research. Dewey Class. No.: 658.83 / BOM