Columbia subject headings:
Beltways--Italy--Palermo--Planning.
City planning--Italy--Palermo.
Highway planning--Italy--Palermo.
Harvard subject headings:
Architecture--Study and teaching--Italy--Palermo.
City planning--Italy--Palermo.
Regional planning--Italy--Palermo.
Urban transportation--Italy--Palermo.
Waterfronts--Italy--Palermo.
Princeton subject headings: