Columbia subject headings:
Harvard subject headings:
Binding, Karl, 1841-1920. Freigabe der Vernichtung lebensunwerten Lebens.
Euthanasia--Germany--History--20th century
Hoche, Alfred Erich, 1865-1943.
Princeton subject headings:
Euthanasia--Germany--History--20th century.
Euthanasia--Law and legislation--Germany--History--20th century.
Killing of the mentally ill--Germany--History--20th century.