Columbia subject headings:
Europe--History--1815-1848--Sources.
Europe--Politics and government--1815-1848.
Great Britain--History--19th century--Sources.
Harvard subject headings:
Europe--History--1815-1848--Sources.
Europe--Politics and government--1815-1848.
Great Britain--History--19th century--Sources.
Princeton subject headings:
Europe--History--1815-1848--Sources.
Europe--Politics and government--1815-1848.
Great Britain--History--19th century--Sources.