Columbia subject headings:
Barth, Heinrich, 1890-1965--Congresses.
Existentialism--Congresses.
Transcendentalism--Congresses.
Harvard subject headings:
Barth, Heinrich, 1890-1965--Congresses.
Existentialism--Congresses.
Transcendentalism--Congresses.
Princeton subject headings:
Barth, Heinrich, 1890-1965--Congresses.
Existentialism--Congresses.
Transcendentalism--Congresses.