Columbia subject headings:
Harvard subject headings:
Portuguese language--Semantics--Congresses.
Portuguese language--Variation--Congresses.
Romance languages--Semantics--Congresses.
Romance languages--Variation--Congresses.
Spanish language--Semantics--Congresses.
Spanish language--Variation--Congresses.
Princeton subject headings:
Portuguese language--Semantics--Congresses.
Portuguese language--Variation--Congresses.
Romance languages--Semantics--Congresses.
Romance languages--Variation--Congresses.
Spanish language--Semantics--Congresses.
Spanish language--Variation--Congresses.