Exhibition catalogue published in conjunction with show held . Written contributions by Erika Billeter, Willy Rotzler, André Thomkins, Mildred Constantine, Magdalena Abakanowicz, Richard Paul Lohse, and Klaus Rinke. Artists includes Magdalena Abakanowicz, Eva Aeppli, Eileen Agar, Arman, Hans Arp, Sophie Tauber-Arp, Joseph Beuys, Gillian Bradshaw-Smith, Jürgen Brodwolf, Rudolf Buchli, Michael Buthe, Christo, Colette, César, John Chamberlain, Lygia Clark, Merce Cunningham, Salvador Dali, Radu Dragomirescu, Margaretha Dubach, Jean Dubuffet, Marcel Duchamp, Franz Eggenschiler, Barry Flanagan, Ruth Francken, Piero Gilardi, Nancy Graves, Gotthard Graubner, Françoise Grossen, Ann Halprin, Maurice Henry, Eva Hesse, James Hill, Rebecca Horn, Peter Jacobi, Allan Kaprow, Edward Kienholz, Yves Klein, Jannis Kounnellis, Piotr Kowalski, Tetsumi Kudo, Thomas Kuhn, Yayoi Kusama, François Xavier Lalanne, Bernhard Luginbühl, Piero Manzoni, Etienne Martin, Juan Miró, Gino Marotta, Robert Morris, Claes Oldenburg, Meret Oppenheim, C.O. Paeffgen, Panamarenko, Anne and Patrick Poirer, Louis Pons, Inge Prokot, Robert Rauschenberg, Man Ray, Martial Raysse, Klaus Rinke, Cornelius Rogge, James Rosenquist, Dieter Roth, Reiner Ruthenbeck, Niki de Saint-Phalle, Lucas Samaras, Bernhard Schultze, Kurt Siligmann, Richard Serra, Alan Shields, Richard Smith, Keith Sonnier, Ferdinand Spindel, Daniel Spoerri, Dorothea Tanning, Antoni Tapiès, Lenore Tawney, André Thomkins, Jean Tinguely, Gérard Titu-Carmel, Franz Erhard Walther, Andy Warhol, Günter Weseler, and Jackie Winsor. Printed in black-and-white. Text in German. Front board features a cut-out window that reveals a small plastic bag of feathers, which is taped to the first interior page.