Columbia subject headings:
Europe, Central--History--Congresses.
Europe, Eastern--History--Congresses.
Nation-state--Congresses.
Harvard subject headings:
Europe, Central--Civilization--19th century.
Europe, Central--Languages--Political aspects.
Europe, Eastern--Civilization--19th century.
Europe, Eastern--Languages--Political aspects.
Nationalism--Europe, Central--History--19th century.
Nationalism--Europe, Eastern--History--19th century.
Princeton subject headings:
Europe, Central--Civilization--19th century.
Europe, Central--Languages--Political aspects.
Europe, Eastern--Civilization--19th century.
Europe, Eastern--Languages--Political aspects.
Nationalism--Europe, Central--History--19th century.
Nationalism--Europe, Eastern--History--19th century.