TY  - BOOK
AU  -  DeFleur,Melvin L.
TI  -  Theories of mass communication / 
U1  -  302.23 
PY  - 1970///
CY  -  New York : 
PB  -  David McKay Co., 
KW  -  Mass media
KW  -  Social aspects
KW  -  United States
KW  -  History
N1  -  Includes bibliography (p.173-180) and index
ER  -