Columbia subject headings:
Germany--Ethnic relations.
National socialism.
Romani Genocide, 1939-1945.
World War, 1939-1945--Atrocities.
Harvard subject headings:
Romani Genocide, 1939-1945
Romanies--Europe--History--20th century.
Princeton subject headings:
Romanies--Europe--History.
Romanies--Germany--History.
Romanies--Nazi persecution--Germany.