Columbia subject headings:
Greece--Foreign relations--Turkey.
Turkey--Foreign relations--Greece.
World War, 1914-1918--Territorial questions--Greece.
Harvard subject headings:
Espionage, Greek--Turkey--History.
Greeks--Turkey--Political activity--History.
Turkey--History--Revolution, 1918-1923--Secret service.
Turkey--History--Revolution, 1918-1923--Societies, etc.
Princeton subject headings:
Greece--Foreign relations--Turkey.
Turkey--Foreign relations--Greece.
World War, 1914-1918--Territorial questions--Greece.