Columbia subject headings:
Brazil--Politics and government--1930-1945--Sources.
Political parties--Brazil--History--Sources.
Rio Grande do Sul (Brazil : State)--Politics and government--Sources.
Harvard subject headings:
Brazil--Politics and government--1930-1945--Sources.
Political parties--Brazil--History--Sources.
Rio Grande do Sul (Brazil : State)--Politics and government--Sources.
Princeton subject headings:
Brazil--History--Revolution, 1930--Sources.
Rio Grande do Sul (Brazil)--History--Sources.