Columbia subject headings:
Hausmann, Raoul, 1886-1971--Criticism and interpretation.
Schwitters, Kurt, 1887-1948--Criticism and interpretation.
Harvard subject headings:
Hausmann, Raoul, 1886-1971--Criticism and interpretation.
Schwitters, Kurt, 1887-1948--Criticism and interpretation.
Princeton subject headings:
Hausmann, Raoul, 1886-1971.
Schwitters, Kurt, 1887-1948.