Columbia subject headings:
Iron industry and trade--Russia (Federation)--Ural Mountains Region.
Steel industry and trade--Russia (Federation)--Ural Mountains Region.
Harvard subject headings:
Iron industry and trade--Ural Mountains Region.
Steel industry and trade--Ural Mountains Region.
Princeton subject headings:
Iron industry and trade--Russia (Federation)--Ural Mountain region.
Steel industry and trade--Russia (Federation)--Ural Mountain region.