De-Fleur, Melvin L. 1923- Theories of mass communication / Melvin L. De-Fleur and Sandra Ball-Rokeach - 3rd ed. - New York : D. McKay, c1975 - xv, 288 p. : ill. ; 21 cm. ISBN: 067930293X : PND 19.99 Subjects--Topical Terms: Mass media--Social aspects Dewey Class. No.: 301.243