Columbia subject headings:
Authors, Italian--20th century--Biography--Congresses.
Valeri, Diego, 1887-1976--Congresses.
Harvard subject headings:
Authors, Italian--20th century--Biography--Congresses
Valeri, Diego, 1887-1976--Congresses.
Princeton subject headings:
Authors, Italian--20th century--Biography--Congresses.
Valeri, Diego, 1887-1976--Congresses.