Columbia subject headings:
Harvard subject headings:
Conservation of natural resources--Papua New Guinea--Congresses.
Environmental policy--Papua New Guinea--Congresses.
Human ecology--Papua New Guinea--Congresses.
Traditional farming--Papua New Guinea--Congresses.
Princeton subject headings:
Conservation of natural resources--Papua New Guinea--Congresses.
Environmental policy--Papua New Guinea--Congresses.
Human ecology--Papua New Guinea--Congresses.
Traditional farming--Papua New Guinea--Congresses.