Columbia subject headings:
Cossacks--History.
Orenburgskai︠a︡ gubernii︠a︡ (R.S.F.S.R.)--History.
Harvard subject headings:
Cossacks--Russia (Federation)--Orenburg Region--History.
Cossacks.
Orenburg Region (Russia)--History, Military.
Orenburgskiy kray (Russia)
Russia. Armii͡a. Orenburgskoe kazachʹe voĭsko--History.
Russia. Armii︠a︡. Orenburgskoe kazachʹe voĭsko.
Princeton subject headings:
Cossacks--History.
Orenburgskai︠a︡ oblastʹ (Russia)--History.