Columbia subject headings:
Harvard subject headings:
Constantine I, king of the Hellenes, 1868-1923.
Greece--History--1917-1944.
Greece--History--Constantine I, 1913-1917.
Venizelos, Eleutherios, 1864-1936.
Zavitzianos, Kōnstantinos G.
Princeton subject headings:
Constantine I, King of the Hellenes, 1868-1923.
Greece--History--1917-1944.
Greece--History--Constantine I, 1913-1917.
Venizelos, Eleutherios, 1864-1936.
Zavitzianos, Kōnstantinos G.