Concept conceptruimte = Konzept Konzeptraum ; 1: Systeemschilderijen, 2: Mike Hammer, 3: T.M., G.T., G.S., G.Z., T.T.T. / A.R. Penck
Catalog of an exhibition held at the Museum Boymans-Van Beuningen, Oct. 6-Nov. 18, 1979