Columbia subject headings:
Working class--Brazil--Pelotas (Rio Grande do Sul)--History.
Working class--Brazil--Pelotas (Rio Grande do Sul)--Societies, etc.
Working class--Brazil--Rio Grande do Sul (State)--History.
Working class--Brazil--Rio Grande do Sul (State)--Societies, etc.
Harvard subject headings:
Working class--Brazil--Pelotas (Rio Grande do Sul)--History.
Working class--Brazil--Rio Grande (Rio Grande do Sul)--History.
Princeton subject headings:
Working class--Brazil--Pelotas--History.
Working class--Brazil--Pelotas--Societies, etc.
Working class--Brazil--Rio Grande do Sul--History.
Working class--Brazil--Rio Grande do Sul--Societies, etc.