Columbia subject headings:
Ethnology--Russia (Federation)--Ri︠a︡zanskai︠a︡ oblastʹ--Bibliography.
Ri︠a︡zanskai︠a︡ oblastʹ (Russia)--Bibliography.
Harvard subject headings:
Ethnology--Russia (Federation)--Ri︠a︡zanskai︠a︡ oblastʹ--Bibliography.
Ri︠a︡zanskai︠a︡ oblastʹ (Russia)--Bibliography.
Princeton subject headings: