Columbia subject headings:
Costa, Andrea, 1851-1910--Congresses.
Italy--Politics and government--1870-1914--Congresses.
Italy. Parlamento. Camera dei deputati--History--Congresses.
Ravenna (Italy)--Politics and government--Congresses.
Socialism--Italy--History--Congresses.
Socialism--Italy--Ravenna--History--Congresses.
Harvard subject headings:
Costa, Andrea, 1851-1910--Congresses.
Italy--Politics and government--1870-1914--Congresses.
Italy. Parlamento. Camera dei deputati--History--Congresses.
Ravenna (Italy)--Politics and government--Congresses.
Socialism--Italy--Congresses
Socialism--Italy--History--Congresses.
Socialism--Italy--Ravenna--Congresses.
Socialism--Italy--Ravenna--History--Congresses.
Princeton subject headings:
Costa, Andrea, 1851-1910--Congresses.
Italy--Politics and government--1870-1914--Congresses.
Italy. Parlamento. Camera dei deputati--History--Congresses.
Ravenna (Italy)--Politics and government--Congresses.
Socialism--Italy--History--Congresses.
Socialism--Italy--Ravenna--History--Congresses.