Columbia subject headings:
Leningradskai︠a︡ oblastʹ (Russia)--Administrative and political divisions.
Leningradskai︠a︡ oblastʹ (Russia)--Economic conditions.
Leningradskai︠a︡ oblastʹ (Russia)--Population.
Harvard subject headings:
Leningradskai︠a︡ oblastʹ (Russia)--Administrative and political divisions.
Leningradskai︠a︡ oblastʹ (Russia)--Economic conditions.
Leningradskai︠a︡ oblastʹ (Russia)--Population.
Princeton subject headings:
Leningradskai︠a︡ oblastʹ (Russia)--Administrative and political divisions.
Leningradskai︠a︡ oblastʹ (Russia)--Economic conditions.
Leningradskai︠a︡ oblastʹ (Russia)--Population.