Columbia subject headings:
Balkan Peninsula--History--19th century.
Eastern question (Balkan)
Europe--Politics and government--1815-1848.
Harvard subject headings:
Balkan Peninsula--History--19th century.
Eastern question (Balkan)
Europe--Politics and government--1815-1848.
Princeton subject headings:
Balkan Peninsula--History--19th century.
Eastern question (Balkan)
Europe--Politics and government--1815-1848.