Agee, Warren K. <br/><br/>Introduction to mass communications / Warren K. Agee, Phillip H. Ault and Edwin Emery.   -- 12th ed.  -- New York:  Addison-Wesley Educational Publishers Inc.,  1997.  <br/>xviii, 574 p. :  ill. ;  23 cm. <br/><br/> Includes bibliographical references and index.  <br/><br/><label>ISBN: </label>0321056132 <br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media.<br/><br/><label>Dewey Class. No.: </label>Res 302.23 Ag32 1997