Columbia subject headings:
Nationalism--Europe, Eastern--Congresses.
Harvard subject headings:
Balkan Peninsula--Ethnic relations--Congresses.
Europe, Eastern--Ethnic relations--Congresses.
Minorities--Balkan Peninsula--Congresses.
Minorities--Europe, Eastern--Congresses.
Nationalism--Balkan Peninsula--Congresses.
Nationalism--Europe, Eastern--Congresses
Princeton subject headings:
Nationalism--Europe, Eastern--Congresses.