Columbia subject headings:
Harvard subject headings:
Austria--Civilization--Congresses.
Hungary--Civilization--Congresses.
Minorities--Pannonia Region--History--Congresses.
Pannonia Region--Civilization--Congresses.
Yugoslavia--Civilization--Congresses.
Princeton subject headings:
Austria--Civilization--Congresses.
Hungary--Civilization--Congresses.
Yugoslavia--Civilization--Congresses.