Columbia subject headings:
Amazon River Region--Economic conditions.
International business enterprises--Amazon River Region.
Nature--Effect of human beings on--Amazon River Region.
Harvard subject headings:
Amazon River Region--Economic conditions.
International business enterprises--Amazon River Region.
Nature--Effect of human beings on--Amazon River Region
Princeton subject headings:
Amazon River Region--Economic conditions.
International business enterprises--Amazon River Region.
Nature--Effect of human beings on--Amazon River Region.