Columbia subject headings:
Empresses--Austria--Biography.
Zita, Empress, consort of Charles I, Emperor of Austria, 1892-1989.
Harvard subject headings:
Empresses--Austria--Biography
Zita, Empress, consort of Charles I, Emperor of Austria, 1892-1989.
Princeton subject headings:
Empresses--Austria--Biography.
Zita, Empress, consort of Charles I, Emperor of Austria, 1892-1989.