Columbia subject headings:
Authors, Italian--20th century--Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Ridolfi, Roberto, 1899-1991--Correspondence.
Harvard subject headings:
Authors, Italian--20th century--Correspondence
Papini, Giovanni, 1881-1956--Correspondence.
Ridolfi, Roberto, 1899-1991--Correspondence.
Princeton subject headings:
Authors, Italian--20th century--Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Ridolfi, Roberto, 1899-1991--Correspondence.