Columbia subject headings:
Demography--Congresses.
Demography--Russia (Federation)--Congresses.
Population--History--Congresses.
Russia (Federation)--Population--History--Congresses.
Harvard subject headings:
Demography--Congresses.
Demography--History--Congresses.
Demography--Russia (Federation)--Congresses.
Demography--Russia (Federation)--History--Congresses.
Population--History--Congresses.
Russia (Federation)
Russia (Federation)--Population--History--Congresses.
Princeton subject headings: