Dillon, William R. Marketing research in a marketing environment / William R. Dillon, Thomas J. Madden, Neil H. Firtle. - 2nd ed. - Homewood, Ill. : Irwin, c1990. - xxiv, 853p. : ill. ; 23 cm. Glossary : p. 820 - 837. Includes bibliographies. ISBN: 0256079773 Subjects--Topical Terms: Marketing research.