Kaufmann/Paul/Hambraeus/Bussotti/Raxach/Cage/Michel/Welin/Lutoslawsky
24/10/1971 - 11:00
Basilika Seckau
Bengt Hambraeus, Berthold Paul, Dieter Kaufmann, Enrique Raxach, John Cage, Karl-Erik Welin, Sylvano Bussotti, Wilfried Michel, Witold Lutoslawsky