Columbia subject headings:
Italian language--Grammar--Congresses.
Italian language--Variation--Congresses.
Linguistic change--Congresses.
Harvard subject headings:
Italian language--Grammar--Congresses.
Italian language--History--Congresses.
Italian language--Variation--Congresses.
Linguistic change--Congresses.
Princeton subject headings:
Italian language--Grammar--Congresses.
Italian language--History--Congresses.
Italian language--Variation--Congresses.
Linguistic change--Congresses.