Columbia subject headings:
Harvard subject headings:
Halle an der Saale (Germany)--Relations--Europe, Eastern--Congresses.
Halle an der Saale (Germany)--Relations--Europe, Western--Congresses.
Language and languages--Study and teaching--Germany--Halle an der Saale--History--18th century--Congresses.
Language and languages--Study and teaching--Germany--Halle an der Saale--Societies, etc.--History--18th century--Congresses.
Multilingualism--Germany--Halle an der Saale--History--18th century--Congresses.
Princeton subject headings:
Halle an der Saale (Germany)--Relations--Europe, Eastern--Congresses.
Halle an der Saale (Germany)--Relations--Europe, Western--Congresses.
Language and languages--Study and teaching--Germany--Halle an der Saale--History--18th century--Congresses.
Language and languages--Study and teaching--Germany--Halle an der Saale--Societies, etc.--History--18th century--Congresses.
Multilingualism--Germany--Halle an der Saale--History--18th century--Congresses.