Columbia subject headings:
Harvard subject headings:
Dialectology--Congresses.
Europe--Language--Congresses.
Italian language--Dialects--Italy--Congresses.
Language and languages--Variation--Congresses
Standard language--Europe--Congresses.
Standard language--Italy--Congresses.
Princeton subject headings:
Dialectology--Congresses.
Europe--Language--Congresses.
Italian language--Dialects--Italy--Congresses.
Language and languages--Variation--Congresses.
Standard language--Europe--Congresses.
Standard language--Italy--Congresses.