Columbia subject headings:
Harvard subject headings:
Austria--History--1867-1918.
Austria--History--1918-1938.
Austria--Kings and rulers--Biography.
Charles I, Emperor of Austria, 1887-1922.
Empresses--Austria--Biography
Franz Ferdinand, Archduke of Austria, 1863-1914.
Habsburg, House of.
Zita, Empress, consort of Charles I, Emperor of Austria, 1892-1989.
Princeton subject headings:
Austria--History--1867-1918.
Austria--History--1918-1938.
Austria--Kings and rulers--Biography.
Charles I, Emperor of Austria, 1887-1922.
Empresses--Austria--Biography.
Franz Ferdinand, Archduke of Austria, 1863-1914.
Habsburg, House of.
Zita, Empress, consort of Charles I, Emperor of Austria, 1892-1989.