Columbia subject headings:
Iron industry and trade--Europe--Statistics--Periodicals.
Steel industry and trade--Europe--Statistics--Periodicals.
Harvard subject headings:
Iron industry and trade--Europe--Statistics--Periodicals.
Steel industry and trade--Europe--Statistics--Periodicals.
Princeton subject headings:
Iron industry and trade--Europe--Statistics--Periodicals.
Steel industry and trade--Europe--Statistics--Periodicals.