Columbia subject headings:
Archives--Italy--Umbria--History--Congresses.
Deputazione di storia patria per l'Umbria--Congresses.
Perugia (Italy)--History--Congresses.
Umbria (Italy)--History--Societies, etc.--Congresses.
Harvard subject headings:
Archives--Italy--Umbria--History--Congresses.
Deputazione di storia patria per l'Umbria--Congresses.
Perugia (Italy)--History--Congresses.
Umbria (Italy)--History--Societies, etc.--Congresses.
Princeton subject headings:
Umbria (Italy)--Historiography--Congresses.
Umbria (Italy)--History--Congresses.