De Fleur, Melvin Lawrence. 1923- Theories of mass communication / Melvin L. De Fleur, Sandra Ball-Rokeach. - 3d ed. - New York : D. McKay Co., c1975 [Reprinted 1977]. - xv, 288 p. : ill. ; 21 cm. Includes bibliographical references and index. ISBN: 0582280176 067930293X Subjects--Topical Terms: Mass media--Social aspects. Dewey Class. No.: 302.23 / DET 1977