Schramm, Wilbur. <br/><br/>
The process and efects of mass communication 

 - Rev. ed. 
 - Urbana :  University of Illinois,  1971 
 - 997 p. 
<br/><br/><label>LCCN: </label>56772 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comunicación de masas.
<br/><br/><label>Dewey Class. No.: </label>301.24  / S2 1971