Columbia subject headings:
Harvard subject headings:
Euthanasia--Germany--Klingenmünster--History--20th century--Congresses.
Euthanasia--Germany--Oldenburg--History--20th century--Congresses.
Euthanasia--Germany--Saxony--History--20th century--Congresses.
Involuntary sterilization--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.
Princeton subject headings:
Euthanasia--Germany--Klingenmünster--History--20th century--Congresses.
Euthanasia--Germany--Oldenburg--History--20th century--Congresses.
Euthanasia--Germany--Saxony--History--20th century--Congresses.
Involuntary sterilization--Germany--History--20th century--Congresses.
National socialism and medicine--Congresses.