Columbia subject headings:
Harvard subject headings:
Cossacks--Russia (Federation)--Siberia--History.
Cossacks--Russia (Federation)--Ural Mountains Region--History.
Princeton subject headings:
Cossacks--Russia (Federation)--Siberia.
Cossacks--Russia (Federation)--Ural Mountains Region.
Siberia (Russia)--History.
Ural Mountains Region (Russia)--History.