TY  - BOOK
AU  - DeFleur,Melvin L.
TI  - Understanding Mass Communication
SN  - 0-395-47272-5
AV  - P92.U5.  D443 1991
PY  - 1991///
CY  - Boston
PB  - Hougthon Miffin Company
KW  - mass communication
KW  - oldest medium
KW  - newspapers, magazines
ER  -