Columbia subject headings:
Criminal behavior--Genetic aspects.
Medicine--Political aspects--Germany.
National socialism and medicine.
Nazis--Germany--Biography.
Neurologists--Germany--Biography.
Physicians--Political activity--Germany.
Psychologists--Germany--Biography.
Racism--Germany--History--20th century.
Ritter, Robert, 1901-1951.
Romanies--Crimes against--Germany--History.
Romanies--Germany--Social conditions.
Harvard subject headings:
National socialism and medicine.
Nazis--Germany--Biography
Neurologists--Germany--Biography.
Psychologists--Germany--Biography
Ritter, Robert, 1901-1951.
Princeton subject headings:
National socialism and medicine.
Nazis--Germany--Biography.
Neurologists--Germany--Biography.
Psychologists--Germany--Biography.
Ritter, Robert, 1901-1951.