Columbia subject headings:
Charles IV, King of Spain, 1748-1819.
Spain--History--Charles IV, 1788-1808.
Harvard subject headings:
Charles IV, King of Spain, 1748-1819.
Spain--History--Charles IV, 1788-1808.
Princeton subject headings:
Charles IV, King of Spain, 1748-1819.
Spain--History--Charles IV, 1788-1808.