Columbia subject headings:
Harvard subject headings:
Germany--Ethnic relations--Political aspects.
Germany--Ethnic relations--Social aspects.
Germany--Ethnic relations.
Germany--Social conditions--20th century.
Immigrants--Germany
Noncitizens--Germany
Racism--Germany
Princeton subject headings:
Germany--Ethnic relations.
Germany--Social conditions--20th century.
Noncitizens--Germany.
Racism--Germany.