Columbia subject headings:
Germans--Hungary--Congresses.
Germany--Relations--Hungary--Congresses.
Hungary--Relations--Germany--Congresses.
Harvard subject headings:
Germans--Hungary--Congresses.
Germany--Relations--Hungary--Congresses.
Hungary--Relations--Germany--Congresses.
Princeton subject headings:
Germans--Hungary--Congresses.
Germany--Relations--Hungary--Congresses.
Hungary--Relations--Germany--Congresses.