César Bolaños and Mauricio Milchberg, Canción sin Palabras, 1970For piano (2 performers) and magnetic tape (14 min. 22 sec.)
César Bolaños and Mauricio Milchberg, Sialoecibi, 1970For piano and one reciter-mime-actor (9 min. 03 sec.)
Audio file
Audio file with sonogram
Audio file with score
Audio file with limited access