Columbia subject headings:
Vittorini, Elio, 1908-1966--Criticism and interpretation--Congresses.
Harvard subject headings:
Vittorini, Elio, 1908-1966--Congresses.
Vittorini, Elio, 1908-1966--Criticism and interpretation--Congresses.
Princeton subject headings:
Vittorini, Elio, 1908-1966--Criticism and interpretation--Congresses.