The art of German drawing 7 Free abstraction : Peter Brüning, Bernard Schultze, Emil Schumacher, K.R.H. Sonderborg, Hann Trier - Goethe-Institut <London> 1990-05-04/1990-06-15; Scottish National Gallery of Modern Art <Edinburgh> 1990-06-24/1990-09-02; Goethe-Institut <London> [Hrsg.] (London, 1990)
Keywords: Brüning, Peter; Schultze, Bernard; Schumacher, Emil; Sonderborg, K. R. H; Trier, Hann