TY  - BOOK
AU  - Davison,W.Phillips
AU  - Boylan,James R.
AU  - Yu,Frederick T.C.
TI  - Mass media : : systems and effects / 
SN  - 0275891402
U1  - 302.23 DAV 
PY  - 1976///
CY  - New York : 
PB  - Praeger, 
KW  - Mass media
KW  - Social aspects
KW  - Communication
N1  - Included bibliographical references and index
ER  -