Exhibition catalogue published in conjunction with two simultaneous shows held at the Kunsthalle Basel and at the Kunstmuseum Basel, Basel, Switzerland, March 8 - April 16, 1975. Includes writing by Donald Judd, Carlo Huber, and Franz Meyer. Includes biography, exhibition history, and exhibition checklist. Illustrated in black-and-white, with 1 full-color plate. Text in German and limited English.