Columbia subject headings:
Attitude change.
Mass media--Political aspects--United States.
Mass media--Psychological aspects.
Mass media--Social aspects--United States.
Public opinion polls.
Harvard subject headings:
Attitude change.
Mass media--Political aspects--United States
Mass media--Psychological aspects
Mass media--Social aspects--United States
Public opinion polls
Princeton subject headings:
Attitude change.
Mass media--Political aspects--United States.
Mass media--Psychological aspects.
Mass media--Social aspects--United States.
Public opinion polls.