Columbia subject headings:
Harvard subject headings:
Culture--Congresses.
Ethnology--Congresses
Natural resources--Social aspects--Congresses.
Nonrenewable natural resources--Social aspects--Congresses.
Scarcity--Social aspects--Congresses.
Princeton subject headings:
Culture--Congresses.
Ethnology--Congresses.
Natural resources--Social aspects--Congresses.
Nonrenewable natural resources--Social aspects--Congresses.
Scarcity--Social aspects--Congresses.