Columbia subject headings:
Amadeo I, King of Spain, 1845-1890.
Spain--Kings and rulers--Biography.
Spain--Politics and government--1868-1875.
Harvard subject headings:
Amadeo I, King of Spain, 1845-1890.
Spain--Kings and rulers--Biography.
Spain--Politics and government--1868-1875.
Princeton subject headings:
Amadeo I, King of Spain, 1845-1890.
Nobility--Italy--Biography.
Spain--Kings and rulers--Biography.