TY  - BOOK
AU  - Davidson,W.Phillips
AU  - Boylan,James
TI  - Mass media: systems and effects 
SN  - 0030524814
AV  - HM258 .D29
PY  - 1982///
CY  - New York
PB  - Holt
KW  - Communicataion
KW  - social aspects
KW  - Mass media
N1  - Includes bibliographical references and index
ER  -