Columbia subject headings:
Peninsular War, 1807-1814.
Portugal--History--1789-1900.
Spain--History--Napoleonic Conquest, 1808-1813.
Harvard subject headings:
Peninsular War, 1807-1814.
Portugal--History--1789-1900.
Spain--History--Napoleonic Conquest, 1808-1813.
Princeton subject headings:
Great Britain--Foreign relations--Portugal.
Peninsular War, 1807-1814.
Portugal--Foreign relations--Great Britain.
Portugal--History--John VI, 1816-1826.
Portugal--History--Maria I, 1777-1816.
Spain--History--Napoleonic Conquest, 1808-1813.