Columbia subject headings:
Europe--History--1918-1945.
Europe--Social conditions--20th century.
Holocaust, Jewish (1939-1945)--Causes.
Holocaust, Jewish (1939-1945)--Psychological aspects.
Holocaust, Jewish (1939-1945)--Social aspects.
Harvard subject headings:
Europe--History--1918-1945.
Europe--Social conditions--20th century.
Holocaust, Jewish (1939-1945)--Sociological aspects.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Social aspects.