Columbia subject headings:
Brazil--Economic conditions--1918-
Labor unions--Brazil--Rio de Janeiro--History.
Rio de Janeiro (Brazil)--Social conditions.
Working class--Brazil--Rio de Janeiro--History.
Harvard subject headings:
Labor movement--Brazil--Rio de Janeiro--History--20th century.
Labor unions--Brazil--Rio de Janeiro--History--20th century.
Working class--Brazil--Rio de Janeiro--History--20th century.
Princeton subject headings:
Labor movement--Brazil--Rio de Janeiro--History--20th century.
Labor unions--Brazil--Rio de Janeiro--History--20th century.
Working class--Brazil--Rio de Janeiro--History--20th century.