Columbia subject headings:
Demography--Europe--History--17th century--Congresses.
Demography--Italy--History--17th century--Congresses.
Italy--Economic conditions--17th century--Congresses.
Italy--Population--History--17th century--Congresses.
Harvard subject headings:
Demography--Europe--History--17th century--Congresses.
Demography--Italy--History--17th century--Congresses.
Italy--Economic conditions--17th century--Congresses.
Italy--Population--History--17th century--Congresses.
Princeton subject headings:
Italy--Population--History--Congresses.