Columbia subject headings:
Harvard subject headings:
Germany--Ethnic relations.
Racism--Europe--History.
Racism--Germany--History
Romanies--Europe--Social conditions.
Romanies--Germany--Social conditions.
Princeton subject headings:
Germany--Ethnic relations.
Racism--Europe--History.
Racism--Germany--History.
Romanies--Europe--Social conditions.
Romanies--Germany--Social conditions.