Columbia subject headings:
Harvard subject headings:
Epidemics--Italy--History--Congresses.
Epidemics--Italy--History--To 1500--Congresses.
Families--Italy--History--Congresses.
Families--Italy--History--To 1500--Congresses.
Italy--Emigration and immigration--History--Congresses.
Italy--Population--History--Congresses.
Italy--Population--History--To 1500--Congresses.
Italy--Social conditions--1268-1559--Congresses.
Migration, Internal--Italy--History--Congresses.
Migration, Internal--Italy--History--To 1500--Congresses.
Princeton subject headings:
Epidemics--Italy--History--Congresses.
Families--Italy--History--Congresses.
Italy--Emigration and immigration--History--Congresses.
Italy--Population--History--Congresses.
Italy--Social conditions--1268-1559--Congresses.
Migration, Internal--Italy--History--Congresses.