Columbia subject headings:
Music--Religious aspects--History and criticism.
Religion and drama--History and criticism.
Ritual in art--History and criticism.
Ritual in literature--History and criticism.
Theater--Religious aspects--History and criticism.
Harvard subject headings:
Arts, Modern--20th century--Congresses
Literature, Modern--20th century--History and criticism--Congresses
Music--20th century--History and criticism--Congresses.
Ritual in art--Congresses.
Ritual in literature--Congresses.
Theater--History--20th century--Congresses.
Princeton subject headings: