Columbia subject headings:
Harvard subject headings:
Avant-garde (Aesthetics)--Congresses.
Intermediality--Congresses.
Schwitters, Kurt, 1887-1948--Criticism and interpretation--Congresses.
Princeton subject headings:
Avant-garde (Aesthetics)--Congresses.
Intermediality--Congresses.
Schwitters, Kurt, 1887-1948--Criticism and interpretation--Congresses.