Columbia subject headings:
Companhia Vale do Rio Doce.
Doce River Valley (Minas Gerais and Espírito Santo, Brazil)
Iron industry and trade--Brazil--Doce River Valley (Minas Gerais and Espírito Santo)
Iron mines and mining--Brazil--Doce River Valley (Minas Gerais and Espírito Santo)
Harvard subject headings:
Companhia Vale do Rio Doce--History.
Mineral industries--Brazil--Minas Gerais--History.
Princeton subject headings:
Companhia Vale do Rio Doce.
Iron industry and trade--Brazil--Rio Doce Valley.
Iron mines and mining--Brazil--Rio Doce Valley.