Columbia subject headings:
Harvard subject headings:
Euthanasia--Germany--Andernach--History--20th century--Congresses.
Involuntary sterilization--Germany--Andernach--History--20th century--Congresses.
Provinzial-Heil- und Pflegeanstalt Andernach.
Rhein-Mosel-Fachklinik Andernach--History--20th century--Congresses.
Princeton subject headings:
Euthanasia--Germany--Andernach--Congresses.
Involuntary sterilization--Germany--Rhineland--Congresses.
National socialism and medicine--Germany--Rhineland--Congresses.
Provinzial-Heil- und Pflegeanstalt Andernach--Congresses.