Columbia subject headings:
City planning--Italy--Congresses.
Historic districts--Italy--Congresses.
Urban renewal--Italy--Congresses.
Harvard subject headings:
City planning--Italy--Congresses
Historic districts--Italy--Congresses.
Urban renewal--Italy--Congresses.
Princeton subject headings:
City planning--Italy--Congresses.
Historic districts--Italy--Congresses.
Urban renewal--Italy--Congresses.