Columbia subject headings:
Human ecology--Papua New Guinea.
Wipi (Papua New Guinean people)--Economic conditions.
Harvard subject headings:
Ethnology--Papua New Guinea
Human ecology--Papua New Guinea.
Population biology--Papua New Guinea.
Wipi (Papua New Guinean people)
Princeton subject headings:
Human ecology--Papua New Guinea.
Wipi (Papua New Guinean people)--Economic conditions.