Underhill, Paco. Why we buy : the science of shopping / Paco Underhill. - New York : Simon & Schuster, c1999. - 255 p. ; 25 cm. Includes index. ISBN: 0684849135 LCCN: 99012125 Subjects--Topical Terms: Marketing research.Consumer behavior.Shopping. LC Class. No.: HF5415.2 / .U53 1999 Dewey Class. No.: 658.8/34