Columbia subject headings:
I︠A︡roslavskai︠a︡ oblastʹ (Russia)--Historical geography.
Harvard subject headings:
I︠A︡roslavskai︠a︡ oblastʹ (Russia)--Historical geography.
Princeton subject headings:
I︠A︡roslavskai︠a︡ oblastʹ (Russia)--Historical geography.