Columbia subject headings:
Harvard subject headings:
Europe, Eastern--Emigration and immigration.
Europe, Eastern--Ethnic relations.
Germany--Emigration and immigration.
Jews--Europe, Eastern--History.
Jews--Europe, Eastern--Migrations.
Jews--Germany--History.
Jews--Poland--History.
Poland--Emigration and immigration
Princeton subject headings:
Europe, Eastern--Emigration and immigration.
Europe, Eastern--Ethnic relations.
Germany--Emigration and immigration.
Jews--Europe, Eastern--History.
Jews--Europe, Eastern--Migrations.
Jews--Germany--History.
Jews--Poland--History.
Poland--Emigration and immigration.