Columbia subject headings:
Leopold, Nathan Freudenthal, 1904-1971.
Loeb, Richard A., 1905-1936.
Harvard subject headings:
Crime--Illinois--Chicago--Biography.
Criminals--Illinois--Chicago--Biography
Leopold, Nathan Freudenthal, 1904-1971.
Princeton subject headings:
Leopold, Nathan Freudenthal, 1904-1971.