Columbia subject headings:
Eastern question (Balkan)
Europe--Politics and government--1871-1918.
Serbia--Foreign relations.
World War, 1914-1918--Diplomatic history.
Harvard subject headings:
Eastern question (Balkan)
Europe--Politics and government--1871-1918.
Serbia--Foreign relations.
World War, 1914-1918--Diplomatic history
Princeton subject headings:
Eastern question (Balkan)
Europe--Politics and government--1871-1918.
Serbia--Foreign relations.
World War, 1914-1918--Diplomatic history.