Columbia subject headings:
Harvard subject headings:
Euthanasia--Germany--History--20th century--Congresses.
Euthanasia--Political aspects--Germany--History--20th century--Congresses.
Hadamar (Germany)--History--Congresses.
Killing of the mentally ill--Germany--Hesse--Congresses.
Landesheilanstalt Hadamar--Congresses.
Landesheilanstalt Hadamar.
Medical policy--Germany--History--20th century--Congresses.
Mentally ill--Abuse of--Germany--Hesse--History--20th century--Congresses.
National socialism--Germany--Hesse--Congresses.
Psychiatry--Germany--History--20th century--Congresses.
Psychiatry--Political aspects--Germany--History--20th century--Congresses.
Princeton subject headings:
Euthanasia--Germany--History--Congresses.
Landesheilanstalt Hadamar.
Psychiatry--Germany--History--Congresses.