TY  - BOOK
AU  - Siebert,Fredrick Seaton
AU  - Peterson,Theodore Bernard
AU  - Schramm,Wilbur Lang
TI  - Four theories of the press: the authoritarian, libertarian, social responsibility and soviet communist concepts of what the press should be and do 
PY  - 1956///
CY  - Chicago
PB  - University of Illinois
KW  - Press
KW  - Journalism
KW  - Communication
N1  - Bibliography : p. 147-153
ER  -