Columbia subject headings:
Harvard subject headings:
Holocaust, Jewish (1939-1945)--Austria--Hartheim--Congresses.
Holocaust, Jewish (1939-1945)--Europe--Congresses.
Holocaust, Jewish (1939-1945)--Poland--Trawniki (Lublin)--Congresses.
Jews--Persecutions--History--20th century--Congresses.
Nazi concentration camp guards--Training of--History--20th century--Congresses.
Nazi concentration camps--Austria--History--Congresses.
Nazi concentration camps--Poland--History--Congresses.
Operation Reinhard, Poland, 1942-1943--Congresses.
War criminals--History--20th century--Congresses.
Princeton subject headings:
War criminals--Austria--History--20th century.
World War, 1939-1945--Atrocities--Austria--Hartheim.