Columbia subject headings:
Balkan Peninsula--History--Congresses.
Balkan Peninsula--Relations--Italy--Congresses.
Balkan literature--Congresses.
Italy--Relations--Balkan Peninsula--Congresses.
Harvard subject headings:
Balkan Peninsula--History--Congresses.
Balkan Peninsula--Literatures--Congresses.
Balkan Peninsula--Relations--Italy--Congresses.
Italy--Relations--Balkan Peninsula--Congresses.
Princeton subject headings:
Balkan Peninsula--Congresses.