Columbia subject headings:
Mineral industries--Russia (Federation)--Bashkortostan--History--18th century.
Mineral industries--Russia (Federation)--Bashkortostan--History--19th century.
Harvard subject headings:
Demidov family.
Iron industry and trade--Russia (Federation)--Ural Mountains Region--History--18th century.
Mineral industries--Russia (Federation)--Bashkortostan--History--18th century.
Mineral industries--Russia (Federation)--Bashkortostan--History--19th century.
Princeton subject headings: