Columbia subject headings:
Historians--Italy--Correspondence.
Salvemini, Gaetano, 1873-1957--Correspondence.
Socialists--Italy--Correspondence.
Harvard subject headings:
Historians--Italy--Correspondence
Salvemini, Gaetano, 1873-1957--Correspondence.
Socialists--Italy--Correspondence
Princeton subject headings:
Historians--Italy--Correspondence.
Italy--Politics and government--1870-1914.
Salvemini, Gaetano, 1873-1957--Correspondence.