Exhibition catalogue published in conjunction with show held at the Städtisches Museum Leverkusen, Germany, January 31 - March 2, 1975. Essay by Walter Ehrmann. Includes bibliography. Text in German. [details]
Exhibition catalogue published in conjunction with show held June 26 - August 30, 1981. Essay by Herbert Schneidler. Includes exhibition checklist, biography, bibliography, and exhibition history. Printed in color and black-and-white. ... [details]