Columbia subject headings:
Harvard subject headings:
Austria--Politics and government--1867-1918.
Charles I, Emperor of Austria, 1887-1922.
Hungary--Politics and government--1867-1918
World War, 1914-1918--Austria
Princeton subject headings:
Austria--Politics and government--1867-1918.
Charles I, Emperor of Austria, 1887-1922.
Hungary--Politics and government--1867-1918.
World War, 1914-1918--Austria.