Columbia subject headings:
Harvard subject headings:
Gesellschaft Deutscher Neurologen und Psychiater--History.
National socialism and medicine.
Neurology--Germany--History.
Psychiatry--Germany--History.
Princeton subject headings:
Euthanasia--Government policy--Germany--History--20th century.
Gesellschaft Deutscher Neurologen und Psychiater--History.
National socialism and medicine.
Neurology--Germany--History--20th century.
Psychiatry--Germany--History--20th century.