Columbia subject headings:
Harvard subject headings:
Euthanasia--Germany--History--1933-1945.
Euthanasia--Government policy--Germany--History--20th century.
Heil- und Pflegeanstalt Hamburg-Langenhorn.
Medical ethics--Germany--History--20th century
Mentally ill--Treatment--Germany--History--20th century.
National socialism--Moral and ethical aspects.
Psychiatric hospitals--Germany--Hamburg--History.
Princeton subject headings:
Euthanasia--Government policy--Germany--History--20th century.
Heil- und Pflegeanstalt Hamburg-Langenhorn.
Mentally ill--Treatment--Germany--History--20th century.
National socialism--Moral ans ethical aspects.
Psychiatric hospitals--Germany--Hamburg--History.