出版
Jörg Schellmann and Bernd Klüser, Catalogue Raisonné of Multiples and Prints 1965-1985, Munich/New York, 1985, no. 214 (another example illustrated).
Jörg Schellmann, Joseph Beuys: Die Multiples 1965-1986, Munich/New York 1992, p. 252, nos. 308 and 309 (another example illustrated).