Columbia subject headings:
Harvard subject headings:
Contrastive linguistics--Congresses
German language--Grammar--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Spanish language--Grammar--Congresses.
Spanish language--Study and teaching--Foreign speakers--Congresses.
Princeton subject headings:
Contrastive linguistics--Congresses.
German language--Grammar--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Spanish language--Grammar--Congresses.
Spanish language--Study and teaching--Foreign speakers--Congresses.