DeFleur, Melvin L. <br/><br/>Understanding mass communication / DeFleur, Melvin L.  -- 4th. ed.  -- Boston  :  Houghton Mifflin,  1991 <br/>xiv, 637 p.  ill. ;  25 cm. <br/><br/> Includes index.  <br/><br/><label>ISBN: </label>0395472725 <br/><br/><label>Subjects--Topical Terms: </label><br/>Includes index.<br/><br/><label>Dewey Class. No.: </label>GC 302.23 D361 1991