Columbia subject headings:
Harvard subject headings:
English language--History--Congresses.
Italian language--History--Congresses.
Italian language--Lexicology--Congresses.
Lexicology--Congresses
Princeton subject headings:
English language--History--Congresses.
English language--Lexicography--Congresses.
Italian language--Lexicography--Congresses.
Italian language--Lexicology, Historical--Congresses.
Italian language--Lexicology--Congresses.
Lexicology--Congresses.