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