Columbia subject headings:
Iron industry and trade--Belgium--History.
Iron industry and trade--France--History.
Iron industry and trade--Germany--History.
Iron industry and trade--Great Britain--History.
Iron industry and trade--History--18th century.
Iron industry and trade--History--19th century.
Technology transfer--Europe--History.
Harvard subject headings:
Europe--Commerce--History.
Export marketing--Europe--History.
Iron industry and trade--Europe--History.
Iron industry and trade--Europe--Technological innovations--History.
Iron industry and trade--Technological innovations--Europe--History.
Princeton subject headings:
Europe--Commerce--History.
Export marketing--Europe--History.
Iron industry and trade--Europe--History.
Iron industry and trade--Technological innovations--Europe--History.