Columbia subject headings:
Harvard subject headings:
Bombings--Italy--Milan--History--20th century.
Piazza Fontana Bombing, Milan, Italy, 1969.
Terrorism--Italy--Milan--History--20th century.
Princeton subject headings:
Bombings--Italy--Milan--History--20th century.
Piazza Fontana Bombing, Milan, Italy, 1969.
Terrorism--Italy--Milan--History--20th century.