Columbia subject headings:
Hungary--Ethnic relations.
Minorities--Hungary.
Minorities--Netherlands.
Netherlands--Ethnic relations.
Harvard subject headings:
Hungary--Ethnic relations--Congresses.
Minorities--Hungary--Congresses.
Minorities--Netherlands--Congresses.
Netherlands--Ethnic relations--Congresses.
Princeton subject headings:
Hungary--Ethnic relations--Congresses.
Hungary--Ethnic relations.
Minorities--Hungary--Congresses.
Minorities--Hungary.
Minorities--Netherlands--Congresses.
Minorities--Netherlands.
Netherlands--Ethnic relations--Congresses.
Netherlands--Ethnic relations.