Columbia subject headings:
Mineral industries--Russia (Federation)--Ural Mountains Region.
Miners--Russia (Federation)--Ural Mountains Region.
Serfdom--Russia.
Harvard subject headings:
Mineral industries--Russia (Federation)--Ural Mountains Region.
Miners--Russia (Federation)--Ural Mountains Region.
Serfdom--Russia (Federation)--Ural Mountains Region.
Serfdom--Russia.
Princeton subject headings:
Mineral industries--Ural Mountain region.
Miners--Ural Mountain region.
Serfdom--Russia.