Columbia subject headings:
Harvard subject headings:
Barberi, Francesco--Congresses.
Librarians--Italy--Biography--Congresses.
Libraries--Italy--History--20th century--Congresses.
Princeton subject headings:
Barberi, Francesco--Contributions in library science--Congresses.
Librarians--Italy--Biography--Congresses.
Libraries--Italy--History--20th century--Congresses.