Columbia subject headings:
Europe--History--1848-1849.
Revolutions--Europe--History--19th century.
Harvard subject headings:
Europe--History--1848-1849--Exhibitions.
Europe--History--1848-1849.
Revolutions--Europe--History--19th century
Princeton subject headings:
Europe--History--1848-1849.
Revolutions--Europe--History--19th century.