Columbia subject headings:
Harvard subject headings:
Adelung, Johann Christoph, 1732-1806--Criticism and interpretation--Congresses.
German language--Grammar, Historical--Congresses.
German language--Lexicography--History--Congresses.
Princeton subject headings:
Adelung, Johann Christoph, 1732-1806--Congresses.
German language--Grammar, Historical--Congresses.