Columbia subject headings:
Espionage--Italy--History.
Spies--Europe--History.
World War, 1939-1945--Italy.
World War, 1939-1945--Secret service.
Harvard subject headings:
Espionage--Italy.
World War, 1939-1945--Italy.
Princeton subject headings:
World War, 1939-1945--Secret service--Germany.
World War, 1939-1945--Secret service--Italy.
World War, 1939-1945--Secret service.