Columbia subject headings:
Harvard subject headings:
Cossacks--Politics and government--20th century.
Local government--Law and legislation--Russia (Federation)--Oblastʹ Donskogo Voĭska--History--20th century.
Local government--Russia (Federation)--Oblastʹ Donskogo Voĭska--History--20th century.
Oblastʹ Donskogo Voĭska (Russia)--Politics and government--20th century.
Princeton subject headings:
Don River Region (Russia)--History--Revolution, 1917-1921.
Local government--Law and legislation--Russia (Federation)--Don River Region.
Local government--Russia (Federation)--Caucasus, Northern.