Fonti del testo:
Luciano Berio, Samuel Beckett, Claude Lévi-Strauss
Prima esecuzione:
10/10/1968, New York (without 5th part). Swingle Singers, New York Philharmonic, Luciano Berio. 18/10/1969, Donaueschingen (complete). Swingle Singers, Südwestfunk Orchester, Ernest Bour