Hearing the voice of the market : competitive advantage through creative use of market information / Vincent P. Barabba and Gerald Zaltman. Barabba, Vincent P. 1934- Zaltman, Gerald. Decision making. Industrial management. Marketing research. Competition. 658.802 BAH Includes bibliographical references and index. Boston, Mass. : Harvard Business School, c1991. c1991. 1991 Text xiv, 294 p. : eng