Exhibition catalogue published in conjunction with show held at the Rijksmuseum Kröller-Müller, Otterlo, April 5 - May 25, 1981, and at the Staatliche Kunsthalle, Baden-Baden, July 3 - August 2, 1981. With writing by Katharina Schmidt, Ellen Joosten, and Siegmar Holsten. Translated by Rosemary Kunisch. Includes checklist and biography. Printed in color and black-and-white. Text in German and Dutch.