Columbia subject headings:
Brazil, Northeast--Economic conditions.
Brazil, Northeast--Politics and government.
Brazil--Politics and government--1954-1964.
Harvard subject headings:
Brazil, Northeast--Economic conditions.
Brazil, Northeast--Politics and government.
Brazil--Politics and government--1954-1964.
Princeton subject headings:
Brazil, Northeast--Economic conditions.
Brazil, Northeast--Politics and government.
Brazil--Politics and government--1954-1964.