Columbia subject headings:
Araguaya Valley--Politics and government.
Communism--Brazil--Araguaia River.
Guerrillas--Brazil--Araguaia River.
Harvard subject headings:
Araguaya Valley--Politics and government.
Communism--Brazil--Araguaia River Region.
Guerrillas--Brazil--Araguaia River Region.
Princeton subject headings:
Araguaya Valley--Politics and government.
Communism--Brazil--Araguaya Valley.
Guerrillas--Brazil--Araguaya Valley.