Columbia subject headings:
Holocaust, Jewish (1939-1945)--Causes.
Romano, Sergio, 1929- Lettera a un amico ebreo.
Harvard subject headings:
Holocaust, Jewish (1939-1945)--Causes
Romano, Sergio, 1929- Lettera a un amico ebreo.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Causes.
Romano, Sergio. Lettera a un amico ebreo.