Columbia subject headings:
Communist parties--Brazil--History--20th century.
Socialist parties--Brazil--History--20th century.
Harvard subject headings:
Brazil--Politics and government--1954-1964--Sources.
Brazil--Politics and government--1964-1985--Sources.
Communism--Brazil--History--Sources.
Princeton subject headings:
Communist parties--Brazil--History--20th century.
Socialist parties--Brazil--History--20th century.