Columbia subject headings:
Authors, Italian--20th century--Congresses.
Balbo, Felice--Correspondence.
Ginzburg, Natalia--Correspondence.
Nagel, Ludovica--Correspondence.
Pavese, Cesare--Correspondence.
Harvard subject headings:
Authors, Italian--20th century--Congresses
Balbo, Felice--Correspondence.
Ginzburg, Natalia--Correspondence.
Nagel, Ludovica--Correspondence.
Pavese, Cesare--Correspondence.
Princeton subject headings:
Authors, Italian--20th century--Congresses.
Balbo, Felice--Correspondence.
Ginzburg, Natalia--Correspondence.
Nagel, Ludovica--Correspondence.
Pavese, Cesare--Correspondence.