Columbia subject headings:
Human beings--Effect of environment on--Amazon River Region.
Human ecology--Amazon River Region.
Human ecology--Brazil.
Indians of South America--Amazon River Region.
Harvard subject headings:
Human beings--Effect of environment on--Amazon River Region.
Human ecology--Amazon River Region
Human ecology--Brazil
Indians of South America--Amazon River Region.
Princeton subject headings:
Human ecology--Amazon River Region.
Human ecology--Brazil.
Indians of South America--Amazon River Region.
Nature--Effect of human beings on--Amazon River Region.
Rain forest ecology--Amazon River Region.