Columbia subject headings:
Family demography--France--Congresses.
Family demography--Soviet Union--Congresses.
Harvard subject headings:
Families--France--Congresses.
Families--Soviet Union--Congresses.
France--Population--Congresses.
Soviet Union--Population--Congresses.
Princeton subject headings:
Family demography--France--Congresses.
Family demography--Soviet Union--Congresses.