Recording locations: Funkhaus, Frankfurt, 29 December 1932 (tracks 3-24 to 3-29); Walthamstow Town Hall, London, 27 June 1967 (track 1-1), 28 May 1969 (tracks 3-12 to 3-17); Olympic Studios, London, 3 November 1967 (tracks 1-28, 1-29, 2-1 to 2-10), 7 January 1969 (tracks 2-11 to 2-26), 6 June 1969 (tracks 1-2, 2-27 & 2-28), 7 June 1969 (tracks 2-38 to 2-40); Barking Town Hall, London, 1 February 1969 (tracks 1-18 to 1-23, 1-36 to 1-40), 2-4 June 1969 (tracks 2-31, 2-32, 3-1, 3-8 to 3-11, 3-18 to 3-23); EMI Studios, London, 13 June 1969 (tracks 3-2 to 3-4), 20 April 1970 (tracks 1-3 to 1-7, 1-44 to 1-47), 21 April 1970 (Tracks 1-8 to 1-12), 5 September 1970 (tracks 2-35 to 2-37, 2-41 to 2-43); Columbia 30th Street Studio, New York, 27 February 1970 (tracks 1-13 to 1-17, 1-30 to 1-35, 3-5 to 3-7), 7 May 1971 (tracks 1-24 to 1-27), 14, 20 & 21 May 1971 (tracks 2-29 & 2-30); Cleveland, Ohio, 4 April 1970 (tracks 2-33 & 2-34); Hollywood, California, 29 March 1972 (tracks 1-41 to 1-43); Avery Fisher Hall, New York, 1 December 1975 (track 5-2), 12 February 1977 (tracks 5-1 & 5-6), 22 February 1977 (track 4-1); IRCAM, Paris, 22 & 23 September 1979 (tracks 5-7 to 5-10), 15 November 1979 (track 4-2), 8 April 1983 (tracks 4-4, 5-4 & 5-5), 3 Ocotober 1983 (tracks 4-3 & 5-3), 12, 21, 22, 24 April 1989 (tracks 6-1 to 6-5).
Publishers: Universal Edition, Vienna (Webern, Berio); Associated Music Publishers, Inc. (Carter); Hendon Music/G. Ricordi (Varèse: Déserts, Ecuatorial, Hyperprism); Careers-BMG Music Publishing Inc./G. Ricordi & Co. (Varèse: Ionisation); G. Ricordi & Co. SpA (Varèse: Amériques, Density 21.5, Offrandes, Arcana, Octandre, Intégrales).