Columbia subject headings:
Harvard subject headings:
Euthanasia--Germany--History--20th century
Mentally ill--Crimes against--Germany--History--20th century.
National socialism and medicine
National socialism--Moral and ethical aspects
World War, 1939-1945--Atrocities--Germany
Princeton subject headings:
Euthanasia--Germany--History--20th century.
National socialism and medicine--20th century.
World War, 1939-1945.