Columbia subject headings:
Isabella II, Queen of Spain, 1830-1904.
Spain--History--Isabella II, 1833-1868.
Harvard subject headings:
Isabella II, Queen of Spain, 1830-1904
Spain--History--Isabella II, 1833-1868.
Princeton subject headings:
Isabella II, Queen of Spain, 1830-1904.
Spain--History--Isabella II, 1833-1868.