Columbia subject headings:
Environmentalism in mass media--Congresses.
Mass media--Aesthetics--Congresses.
Mass media--Congresses.
Mass media--Social aspects--Congresses.
Harvard subject headings:
Environmentalism in mass media--Congresses.
Mass media--Aesthetics--Congresses.
Mass media--Congresses
Mass media--Social aspects--Congresses
Princeton subject headings: