Columbia subject headings:
Federação Operária do Rio Grande do Sul--History.
Labor movement--Brazil--Rio Grande do Sul (State)--History.
Labor unions--Brazil--Rio Grande do Sul (State)--History.
Working class--Brazil--Rio Grande do Sul (State)--History.
Harvard subject headings:
Federação Operária do Rio Grande do Sul--History.
Labor movement--Brazil--Rio Grande do Sul--History.
Labor unions--Brazil--Rio Grande do Sul--History.
Working class--Brazil--Rio Grande do Sul--History.
Princeton subject headings:
Labor movement--Brazil--Rio Grande do Sul--History.
Labor unions--Brazil--Rio Grande do Sul--History.
Working class--Brazil--Rio Grande do Sul--History.