Columbia subject headings:
Communication--Research--Congresses.
Mass media--Research--Congresses.
Mass media--Social aspects--Congresses.
Harvard subject headings:
Communication--Research--Congresses.
Mass media--Research--Congresses.
Mass media--Social aspects--Congresses
Princeton subject headings:
Communication--Research--Congresses.
Mass media--Research--Congresses.
Mass media--Social aspects--Congresses.