TY  - BOOK
AU  - Fang,Irving
TI  - A history of mass communication: six information revolutions 
SN  - 0240802543 (pbk.)
PY  - 1997///
CY  - Boston
PB  - Focal Press
KW  - Communication
KW  - History
N1  - Includes index; Includes bibliographical references
ER  -