Columbia subject headings:
Ethnology--Russia (Federation)--Orenburgskai︠a︡ oblastʹ--Congresses.
Germans--Russia (Federation)--Orenburgskai︠a︡ oblastʹ--Congresses.
Orenburgskai︠a︡ oblastʹ (Russia)--Ethnic relations--Congresses.
Harvard subject headings:
Ethnology--Russia (Federation)--Orenburgskai︠a︡ oblastʹ--Congresses.
Germans--Russia (Federation)--Orenburgskai︠a︡ oblastʹ--Congresses.
Orenburgskai︠a︡ oblastʹ (Russia)--Ethnic relations--Congresses.
Princeton subject headings: