TY - JOUR T1 - The mass media as sources of public affairs, science, and health knowledge AU - Wade, Serena AU - Schramm, Wilbur PY - 1969 DO - 10.1086/267691 SP - 197 EP - 209 JO - Public Opinion Quarterly VL - 33 IS - 2 SN - 0033-362X ER -