Columbia subject headings:
Bessarabia (Moldova and Ukraine)--Population.
Bessarabia (Moldova and Ukraine)--Social conditions.
Working class--Bessarabia (Moldova and Ukraine)
Harvard subject headings:
Bessarabia (Moldova and Ukraine)--Population.
Bessarabia (Moldova and Ukraine)--Social conditions.
Labor Bessarabia (Moldova and Ukraine)
Working class--Bessarabia (Moldova and Ukraine)
Princeton subject headings:
Bessarabia (Moldova and Ukraine)--Population.
Bessarabia (Moldova and Ukraine)--Social conditions.
Labor--Russian S.F.S.R.--Bessarabia.