Columbia subject headings:
Harvard subject headings:
Feder, Johann Georg Heinrich, 1740-1821--Congresses.
Philosophy, German--18th century--Congresses.
Philosophy, German--19th century--Congresses.
Princeton subject headings:
Feder, Johann Georg Heinrich, 1740-1821--Congresses.
Philosophy, German--18th century--Congresses.
Philosophy, German--19th century--Congresses.