The practice of mass communication  : some lessons from research 

 - Paris :  UNESCO,  1972 
 - 52 p. 
 - Reports and papers on mass communication  ; 65 .
 - Reports and papers on mass communication  ; 65 .
<br/><br/><label>LCCN: </label>45965 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comunicación de masas.