Columbia subject headings:
Ferdinand I, King of the Two Sicilies, 1751-1825.
Naples (Kingdom)--History--1735-1816.
Naples (Kingdom)--Kings and rulers--Biography.
Harvard subject headings:
Ferdinand I, King of the Two Sicilies, 1751-1825.
Kingdom of the Two Sicilies--History--1816-1861
Kingdom of the Two Sicilies--Kings and rulers--Biography.
Naples (Kingdom)--History--1735-1816.
Naples (Kingdom)--Kings and rulers--Biography.
Princeton subject headings:
Ferdinand I, King of the Two Sicilies, 1751-1825.
Naples (Kingdom)--History--1735-1861.
Naples (Kingdom)--Kings and rulers--Biography.