Columbia subject headings:
Harvard subject headings:
Austria--Relations--Spain--Congresses.
Spain--Relations--Austria--Congresses.
Spanish language--Translating--Congresses.
Spanish language--Variation--Congresses.
Princeton subject headings:
Austria--Relations--Spain--Congresses.
Spain--Relations--Austria--Congresses.
Spanish language--Translating--Congresses.
Spanish language--Variation--Congresses.