Columbia subject headings:
Demographic surveys--Soviet Union.
Migration, Internal--Soviet Union.
Rural-urban migration--Soviet Union.
Harvard subject headings:
Migration, Internal--Russia (Federation)
Migration, Internal--Russia (Federation)--Tverskai͡a oblastʹ
Migration, Internal--Russia (Federation)--Volgogradskai͡a oblastʹ
Rural population--Russia (Federation)
Tverskai︠a︡ oblastʹ (Russia)--Population.
Volgogradskai︠a︡ oblastʹ (Russia)--Population.
Princeton subject headings:
Migration, Internal--Russia (Federation)--Tverskai︠a︡ oblastʹ.
Migration, Internal--Russia (Federation)--Volgogradskai︠a︡ oblastʹ.
Tverskai︠a︡ oblastʹ (Russia)--Population.
Volgogradskai︠a︡ oblastʹ (Russia)--Population.