Columbia subject headings:
Ethnology--Russia, Northern--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--History--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--Population--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--Religious life and customs--Congresses.
Harvard subject headings:
Ethnology--Russia (Federation)--Leningradskai͡a oblastʹ--Atlases--Congresses.
Ethnology--Russia, Northwestern--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--History--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--Religion--Congresses.
Russia, Northwestern--History--Congresses.
Princeton subject headings:
Atlases.
Ethnology--Russia (Federation)--Leningradskai︠a︡ oblastʹ--Atlases--Congresses.
Ethnology--Russia, Northwestern--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--History--Congresses.
Leningradskai︠a︡ oblastʹ (Russia)--Religion--Congresses.
Russia, Northwestern--History--Congresses.