Columbia subject headings:
Harvard subject headings:
Iron industry and trade--Congo (Democratic Republic)
Iron mines and mining--Congo (Democratic Republic)
Steel industry and trade--Congo (Democratic Republic)
Sustainable development--Congo (Democratic Republic)
Princeton subject headings:
Iron industry and trade--Congo (Democratic Republic).
Iron mines and mining--Congo (Democratic Republic).
Steel industry and trade--Congo (Democratic Republic).
Sustainable development--Congo (Democratic Republic).