Columbia subject headings:
Harvard subject headings:
Germany--Politics and government--1789-1900--Congresses
Italy--Politics and government--19th century--Congresses.
Middle class--Germany--History--19th century--Congresses.
Middle class--Italy--History--19th century--Congresses.
Nationalism--Germany--History--19th century--Congresses.
Nationalism--Italy--History--19th century--Congresses.
Princeton subject headings:
Middle class--Germany--History--19th century--Congresses.
Middle class--Italy--History--19th century--Congresses.
Nationalism--Germany--History--19th century--Congresses.
Nationalism--Italy--History--19th century--Congresses.