Columbia subject headings:
Criminal justice, Administration of--United States--History--20th century.
Law enforcement--United States--History--20th century.
Mafia--United States--History--20th century.
Organized crime--United States--History--20th century.
Harvard subject headings:
Criminal justice, Administration of--United States--History--20th century.
Law enforcement--United States--History--20th century.
Mafia--United States--History--20th century.
Organized crime--United States--History--20th century
Princeton subject headings:
Law enforcement--United States--History--20th century.
Mafia--United States--History--20th century.
Organized crime--United States--History--20th century.