Columbia subject headings:
Hungarians--Romania--Transylvania--History.
Hungary--Foreign relations--Romania.
International law.
Romania--Ethnic relations.
Romania--Foreign relations--Hungary.
Romania--History.
Transylvania (Romania)--Ethnic relations.
Transylvania (Romania)--History.
Harvard subject headings:
Hungarians--Romania--Transylvania--History.
Hungary--Foreign relations--Romania
International law.
Romania--Ethnic relations
Romania--Foreign relations--Hungary.
Romania--History.
Transylvania (Romania)--Ethnic relations.
Transylvania (Romania)--History.
Princeton subject headings: