Columbia subject headings:
Cities and towns--Growth--Statistics.
City planning--Italy--Rome--Statistics.
Statistics--Italy--Rome--Statistics.
Harvard subject headings:
Cities and towns--Growth--Statistics.
City planning--Italy--Rome--Statistics.
Statistics--Italy--Rome--Statistics.
Princeton subject headings:
Cities and towns--Growth--Statistics.
City planning--Italy--Rome--Statistics.
Statistics--Italy--Rome--Statistics.
Statistics.