Columbia subject headings:
Germany--Emigration and immigration--Government policy.
Germany--Ethnic relations.
Germany--Politics and government--1918-1933.
Nationalism--Germany--History--20th century.
Russians--Germany--Social conditions--20th century.
Harvard subject headings:
Germany--Emigration and immigration--Government policy.
Germany--Ethnic relations.
Germany--Politics and government--1918-1933
Nationalism--Germany--History--20th century
Russians--Germany--Social conditions--20th century.
Princeton subject headings:
Germany--Emigration and immigration--Government policy--History--20th century.
Germany--Emigration and immigration--History--20th century.