Columbia subject headings:
Authors, Italian--20th century--Correspondence.
De Luca, Giuseppe, 1898-1962--Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Harvard subject headings:
Authors, Italian--20th century--Correspondence
De Luca, Giuseppe, 1898-1962--Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Princeton subject headings:
De Luca, Giuseppe, 1898-1962--Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.