Columbia subject headings:
Abruzzo (Italy)--Civilization--Congresses.
Abruzzo (Italy)--Historical geography--Congresses.
Abruzzo (Italy)--History--Congresses.
Abruzzo (Italy)--Relations--Italy--Marche--Congresses.
Marche (Italy)--Civilization--Congresses.
Marche (Italy)--Historical geography--Congresses.
Marche (Italy)--History--Congresses.
Marche (Italy)--Relations--Italy--Abruzzo--Congresses.
Harvard subject headings:
Abruzzo (Italy)--Civilization--Congresses.
Abruzzo (Italy)--Historical geography--Congresses.
Abruzzo (Italy)--History--Congresses.
Princeton subject headings:
Abruzzo (Italy)--Civilization--Congresses.
Abruzzo (Italy)--Historical geography--Congresses.
Abruzzo (Italy)--History--Congresses.