Columbia subject headings:
Italian language--19th century--Congresses.
Italian language--20th century--Congresses.
Italian language--Lexicology--Congresses.
Harvard subject headings:
Italian language--History--19th century.
Italian language--History--20th century.
Italian language--Lexicology.
Princeton subject headings:
Italian language--History--19th century.
Italian language--History--20th century.
Italian language--Lexicology.