Columbia subject headings:
Europe--Kings and rulers--19th century.
Europe--Politics and government--19th century.
Liberalism--Spain--19th century.
Spain--Politics and government--19th century.
Harvard subject headings:
Europe--Politics and government--1815-1871.
Europe--Relations--Spain.
Liberalism--Europe--History--19th century.
Liberalism--Spain--History--19th century
Spain--Politics and government--1833-1868.
Spain--Relations--Europe.
Princeton subject headings:
Europe--Kings and rulers--19th century.
Europe--Politics and government--19th century.
Liberalism--Spain--19th century.
Spain--Politics and government--19th century.