Famous and very rare catalogue from the Stedelijk Museum Amsterdam from 1961.

With work from Bruno Munari, Roy Ascott, George Brecht, William Copley, Siegfried Cremer, Robert Jacobsen, Philippe Hiquily, Viking Eggeling, Allan Kaprow, Jasper Johns, Harry Kramer, Alfred Leslie, Walter Linck, Heinz Mack, Len Lye, Enzo Mari, Kenneth Martin, Gustav Metzger, Ira Moldow, Otto Piene, Arden Quin, Man Ray, Hans Richter, Niki de Saint Phalle, Soto, Tajiri, Per Olof Ultvedt, Georges Vantongeloo, Alexander Calder, Takis, Nicolas Schöeffer and Pol Bury.