Columbia subject headings:
Voronezhskai︠a︡ oblastʹ (Russia)--History--Sources.
Voronezhskai︠a︡ oblastʹ (Russia)--History.
Harvard subject headings:
Voronezhskai︠a︡ oblastʹ (Russia)--History--Sources.
Voronezhskai︠a︡ oblastʹ (Russia)--History.
Princeton subject headings:
Voronezhskai︠a︡ oblastʹ (Russia)--History--Sources.
Voronezhskai︠a︡ oblastʹ (Russia)--History.