Columbia subject headings:
Harvard subject headings:
Aesthetics, Modern--20th century--Congresses.
Literature--History and criticism--Congresses.
Mysticism--History--20th century--Congresses.
Philosophy, Modern--Congresses.
Visual communication--Congresses
Princeton subject headings:
Mysticism and literature--Congresses.
Mysticism in literature--Congresses.
Mysticism--Philosophy--Congresses.