Columbia subject headings:
Harvard subject headings:
Bessarabia (Moldova and Ukraine)--Emigration and immigration.
Bessarabia (Moldova and Ukraine)--Ethnic relations.
Germans--Bessarabia (Moldova and Ukraine)--History.
Germans--Russia (Federation)--History.
Russia (Federation)--Emigration and immigration.
Russia (Federation)--Ethnic relations.
Princeton subject headings:
Balkan Peninsula--Relations--Russia, Southern.
Germans--Russia, Southern--History.
Russia, Southern--Colonization--History.
Russia, Southern--Relations--Balkan Peninsula.