Columbia subject headings:
Ural Mountains Region (Russia)--Economic conditions.
Working class--Russia (Federation)--Ural Mountains Region--History--19th century.
Harvard subject headings:
Ural Mountains Region (Russia)--Economic conditions.
Working class--Russia (Federation)--Ural Mountains Region--History--19th century.
Princeton subject headings:
Labor--Russia (Federation)--Ural Mountains Region--History--19th century.
Ural Mountains Region (Russia)--Economic conditions.