Columbia subject headings:
Harvard subject headings:
Iron industry and trade--France--Lorraine--History--Pictorial works.
Iron industry and trade--France--Lorraine--History.
Steel industry and trade--France--Lorraine--History--Pictorial works.
Steel industry and trade--France--Lorraine--History.
Princeton subject headings:
Iron industry and trade--France--Lorraine--History.
Iron--Metallurgy.
Steel industry and trade--France--Lorraine--History.
Steel--Metallurgy.