Columbia subject headings:
Documentary photography--Brazil--Rio de Janeiro--History--20th century.
Labor--Brazil--Rio de Janeiro--Pictorial works.
Working class--Brazil--Rio de Janeiro--Pictorial works.
Harvard subject headings:
Documentary photography--Brazil--Rio de Janeiro--History--20th century.
Labor--Brazil--Rio de Janeiro--Pictorial works.
Working class--Brazil--Rio de Janeiro--Pictorial works.
Princeton subject headings:
Documentary photography--Brazil--Rio de Janeiro--History--20th century.
Labor--Brazil--Rio de Janeiro--Pictorial works.
Working class--Brazil--Rio de Janeiro--Pictorial works.