Columbia subject headings:
Amazon River Region--Economic policy.
Ecology--Amazon River Region.
Environmental policy--Amazon River Region.
Environmental policy--Brazil.
Natural resources--Amazon River Region.
Harvard subject headings:
Amazon River Region--Economic policy.
Ecology--Amazon River Region.
Environmental policy--Amazon River Region
Environmental policy--Brazil
Natural resources--Amazon River Region.
Princeton subject headings:
Amazon River Region--Economic policy.
Ecology--Amazon River Region.
Environmental policy--Amazon River Region.
Environmental policy--Brazil.
Natural resources--Amazon River Region.