Columbia subject headings:
Metal-workers--Labor unions--Brazil--São Bernardo do Campo--History--20th century.
Metal-workers--Labor unions--Brazil--São Paulo--History--20th century.
Harvard subject headings:
Metal-workers--Labor unions--Brazil--São Bernardo do Campo (Brazil)--History--20th century.
Metal-workers--Labor unions--Brazil--São Paulo--History--20th century.
Princeton subject headings:
Metal-workers--Labor unions--Brazil--São Bernardo do Campo (Brazil)--History--20th century.
Metal-workers--Labor unions--Brazil--São Paulo--History--20th century.