Columbia subject headings:
Indians of South America--Amazon River Region--Social life and customs.
Sex differences.
Sex role--Amazon River Region.
Harvard subject headings:
Indians of South America--Amazon River Region--Social life and customs
Sex differences.
Sex role--Amazon River Region.
Princeton subject headings:
Indians of South America--Amazon River Region--Sexual behavior.
Indians of South America--Amazon River Region--Social life and customs.
Sex differences--Amazon River Region.
Sex role--Amazon River Region.