"Avant garde vol.2" Deutsche Grammophon(GER) BOX 6lp DISCO=NM COPERTINA=EX+ J.Cage-Gruppe Nuova Consonanza-M.Kagel-G.M.Koenig-Z.Pongracz-R.Riehn-D.Schnebel-K.Stockhausen-B.A.Zimmermann