Marketing research : text and cases / Harper W. Boyd, Jr., Ralph Westfall, Stanley F. Stasch. Boyd, Harper W. Westfall, Ralph L. joint author. Stasch, Stanley F. joint author. Marketing research. HF5415.2 .B65 1977 658.83 BOM Includes bibliographical references and index. Homewood, Ill. : R. D. Irwin, 1977. 1977. 1977 Text xii, 692 p. : eng