Columbia subject headings:
Iron industry and trade--Brazil--History.
Iron industry and trade--Government policy--Brazil--History.
Steel industry and trade--Brazil--History.
Steel industry and trade--Government policy--Brazil--History.
Harvard subject headings:
Iron industry and trade--Brazil--History.
Iron industry and trade--Government policy--Brazil--History.
Steel industry and trade--Brazil--History.
Steel industry and trade--Government policy--Brazil--History.
Princeton subject headings:
Iron industry and trade--Brazil--History.
Steel industry and trade--Brazil--History.