Proctor, Tony. Essentials of marketing research / Tony Proctor. - London : Pitman, 1997. - viii, 360p. : ill 25 cm. ; pbk Includes index ISBN: 0273625314 0273625314 m Nat. Bib. No.: b9736764 Subjects--Topical Terms: Marketing research.Marketing research--Case studies. Dewey Class. No.: 658.83