Davison, W. Phillips <br/><br/>
Mass Media  Systems and effects / 
W. Phillips Davison James Boylan Frederick T.C. Yu 
 - 2nd ed. 
 - New York  Holt  Rinehard and Winston  1982 
 - 264p.  ill.  24cm 
<br/><br/><label>ISBN: </label>0030524814 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication - social aspects<br/>Mass media - social aspects