Columbia subject headings:
Partito socialista italiano--Historiography.
Partito socialista italiano--History.
Socialism--Italy--Historiography.
Socialism--Italy--History.
Harvard subject headings:
Partito socialista italiano--Historiography.
Partito socialista italiano--History.
Socialism--Italy
Socialism--Italy--Historiography.
Socialism--Italy--History
Princeton subject headings:
Partito socialista italiano--Historiography.
Partito socialista italiano--History.
Socialism--Italy--Historiography.
Socialism--Italy--History.