Columbia subject headings:
Authors, Italian--20th century--Correspondence.
Occhini, Barna, 1905---Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Harvard subject headings:
Authors, Italian--20th century--Correspondence
Occhini, Barna, 1905---Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.
Princeton subject headings:
Occhini, Barna, 1905---Correspondence.
Papini, Giovanni, 1881-1956--Correspondence.