Columbia subject headings:
Labor movement--Brazil--São Paulo Metropolitan Area--History--20th century.
Social movements--Brazil--São Paulo Metropolitan Area--History--20th century.
São Paulo Metropolitan Area (Brazil)--Social conditions.
Harvard subject headings:
Social movements--Brazil--São Paulo--History.
Working class--Brazil--São Paulo--History.
Princeton subject headings:
Labor movement--Brazil--São Paulo--History--20th century.
Social movements--Brazil.
Working class--Brazil--São Paulo--History--20th century.
Working class--Brazil--São Paulo--Political activity.