Columbia subject headings:
Ethnobotany--Papua New Guinea--Madang Province.
Ethnobotany--Papua New Guinea--Morobe Province.
Harvard subject headings:
Ethnobotany--Papua New Guinea--Madang Province.
Ethnobotany--Papua New Guinea--Morobe Province.
Princeton subject headings:
Ethnobotany--Papua New Guinea--Nokopo.
Plants, Useful--Papua New Guinea--Nokopo.
Yupna (Papua New Guinean people)--Ethnobotany.
Yupna (Papua New Guinean people)--Social life and customs.