Columbia subject headings:
Balkan Peninsula--Relations--Hungary.
Hungarians--Balkan Peninsula.
Hungary--Relations--Balkan Peninsula.
Minorities--Hungary.
Harvard subject headings:
Hungarians--Communist countries.
Hungary--Foreign relations--Romania
Hungary--History
Romania--Foreign relations--Hungary.
Princeton subject headings:
Balkan Peninsula--Relations--Hungary.
Hungarians--Balkan Peninsula.
Hungary--Relations--Balkan Peninsula.
Minorities--Hungary.