66–71 ↑ Dada, Leah Dickerman, National Gallery of Art, Washington p158 ↑ Quoted in The Collages of Kurt Schwitters, Dietrich, Cambridge University Press 1993, p86 ↑ The Collages of Kurt Schwitters, Dietrich, Cambridge University Press 1993, p6-7 ↑ Dada, Leah Dickerman, National Gallery of Art, Washington p432 ↑ Silke Schröder; Jürgen Husslik; Sagitta Gottfried.