Joseph Beuys : Katalog der Ausstellung im Martin-Gropius-Bau Berlin, 20. 2. - 1. 5. 1988 ; [eine Ausstellung der Stadt Berlin, Kulturstadt Europas 1988]. 2. The secret block for a secret person in Ireland : [ ... und in der Kunsthalle Tübingen (14. 5. - 10. 7. 1988]
Drawings put aside by the artist over the years, representing his selection of thinking forms in evolution over a period of time.