Columbia subject headings:
Harvard subject headings:
Cities and towns--Italy--Arezzo (Province)--History--To 1500--Sources.
Cities and towns--Italy--Perugia (Province)--History--To 1500--Sources.
Cities and towns--Italy--Siena (Province)--History--To 1500--Sources.
Italy--History--1268-1492.
Perugia (Italy)--History.
Perugia (Italy)--Politics and government.
Princeton subject headings:
Perugia (Italy)--History--Sources.
Perugia (Italy)--History.