Columbia subject headings:
Balkan Peninsula--History, Military.
Balkan Peninsula--History--19th century.
Balkan Peninsula--History--Autonomy and independence movements.
Eastern question (Balkan)
Harvard subject headings:
Balkan Peninsula--History, Military.
Balkan Peninsula--History--19th century.
Balkan Peninsula--History--Autonomy and independence movements.
Eastern question (Balkan)
Princeton subject headings:
Balkan Peninsula--History.
Eastern question (Balkan)
Europe--Politics and government--1871-1918.