Columbia subject headings:
Idealism, German--Congresses.
Philosophy, German--History--18th century--Congresses.
Philosophy, German--History--19th century--Congresses.
Philosophy, Modern--History--Congresses.
Harvard subject headings:
Idealism, German--Congresses.
Philosophy, German--18th century--Congresses.
Philosophy, German--19th century--Congresses.
Philosophy, German--Congresses.
Philosophy, Modern--History--Congresses.
Philosophy--History--Congresses.
Princeton subject headings:
Idealism, German--Congresses.
Philosophy, German--History--18th century--Congresses.
Philosophy, German--History--19th century--Congresses.
Philosophy, Modern--History--Congresses.