Columbia subject headings:
Jews--Italy--Umbria--History--Congresses.
Umbria (Italy)--Ethnic relations--Congresses.
Harvard subject headings:
Jews--Italy--Umbria--History--Congresses.
Umbria (Italy)--Ethnic relations--Congresses.
Princeton subject headings:
Jews--Italy--Umbria--History--Congresses.
Umbria (Italy)--Ethnic relations--Congresses.