Columbia subject headings:
Duisburg (Germany)--Politics and government--20th century.
Holocaust, Jewish (1939-1945)--Germany--Duisburg.
National socialism--Germany--Duisburg.
Harvard subject headings:
Jews--Germany--Duisburg--Politics and government--20th century.
Jews--Persecutions--Germany--Duisburg--History--20th century.
National socialism--Germany--Duisburg.
Princeton subject headings: