Columbia subject headings:
Pascoli, Giovanni, 1855-1912--Political and social views.
Harvard subject headings:
Pascoli, Giovanni, 1855-1912--Political and social views.
Princeton subject headings:
Pascoli, Giovanni, 1855-1912.
Socialism--Italy--History--19th century--Congresses.
Socialism--Italy--History--20th century--Congresses.