Columbia subject headings:
Euthanasia--Germany--History--20th century--Congresses.
Mentally ill--Crimes against--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.
National socialism--Moral and ethical aspects--Congresses.
Harvard subject headings:
Euthanasia--Germany--History--20th century
Medical ethics--Germany--History--20th century
National socialism and medicine
Princeton subject headings:
Euthanasia--Germany--History--20th century--Congresses.
Mentally ill--Crimes against--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.