Columbia subject headings:
Harvard subject headings:
Contrada, Bruno.
Mafia--Italy--Palermo--Case studies.
Palermo (Italy)--Social conditions--20th century.
Police corruption--Italy--Palermo--Case studies.
Princeton subject headings:
Contrada, Bruno--Trials, litigation, etc.
Mafia--Italy--Sicily.
Police corruption--Italy--Sicily.
Trials (Police misconduct)--Italy.