Columbia subject headings:
Engel, Johann Jacob, 1741-1802--Congresses.
Enlightenment--Germany--Berlin--Congresses.
Harvard subject headings:
Engel, Johann Jacob, 1741-1802--Congresses.
Enlightenment--Germany--Berlin--Congresses.
Princeton subject headings:
Authors, German--18th century--Criticism and interpretation.
Engel, Johann Jacob, 1741-1802.