Columbia subject headings:
Europe, Central--Ethnic relations--Congresses.
Europe, Eastern--Ethnic relations--Congresses.
Minorities--Europe, Central--Congresses.
Minorities--Europe, Eastern--Congresses.
Harvard subject headings:
Europe, Central--Ethnic relations--Congresses.
Europe, Eastern--Ethnic relations--Congresses.
Minorities--Europe, Central--Congresses.
Minorities--Europe, Eastern--Congresses.
Princeton subject headings:
Minorities--Balkan Peninsula--Political activity--Congresses.
Minorities--Europe, Eastern--Political activity--Congresses.
Minorities--Government policy--Balkan Peninsula--Congresses.
Minorities--Government policy--Europe, Eastern--Congresses.