Columbia subject headings:
Aktion T4 (Germany)--Congresses.
Euthanasia--Germany--History--20th century--Congresses.
Medical ethics--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.
Harvard subject headings:
Aktion T4 (Germany)
Aktion T4 (Germany)--Biography--Congresses.
Aktion T4 (Germany)--History--Congresses.
Euthanasia--Germany--History--20th century--Congresses.
Medical ethics--Germany--History--20th century--Congresses.
National socialism and medicine--Moral and ethical aspects--Congresses.
People with disabilities--Nazi persecution--Germany--Congresses.
Princeton subject headings:
Aktion T4 (Germany)--Congresses.
Euthanasia--Germany--History--20th century--Congresses.
Medical ethics--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.