. . . . . . . . . . . . "Variations 1"@en . . . . "Variations I : extra materials" . "Variations I : extra materials"@en . . . . . "Variations I"@en . "Variations I" . . . "Variations I: extra materials" . . . . . "Variations I [for] any number of performers, any kind and number of instruments : 1958" . . . . "Variations 1" . "Variations I : any number of performers, any kind and number of instruments" . "Variations I for any number of performers, any kind and number of instruments" . . . . . . "Variations I... : any number of performers; any kind and number of instruments... : January, 1958" . "Variations I extra materials : [for any number of performers, any kind and number of instruments] : 1958" . . . "Manuscripts" . . . . . "One score consisting of a title page with performance instructions and 6 transparent sheets containing lines or dots meant to be overlapped to determine composition. Reproduction from a holographic original."@en . "Variations I [for] any numbers of performers ; any kind and number of instruments" . . . . . "Variations I : extra materials (1958)"@en . . . "Variations I. Extra materials"@en . . . . . . "Variations 1 [for] any number of performers : any kind and number of instruments"@en . . . "Scores"@en . . . "Variations I : [for] any numbers of performers ; any kind and number of instruments" . . . . "Variations for David Tudor, on his birthday (tardily), January 1958"@en . . "Variations I extra materials" . . . . "Variations I : extra materials : Stony Point, 1958" . "Variations I : for David Tudor on his birthday (Tardily), january 1958" . "Variations I: Extra materials : 1958" . . "Variations I : for David Tudor on his birthday (tardily), January 1958" . "Facsimiles" . "Variations I : 1958" . "for David Tutor : on his birthday (tardily), January 1958" . "Musique aléatoire." . . "C.F. Peters (Firm)" . . "Aleatory music." . . "Henmar Press (Firm)" . . "Musique aléatoire 20e siècle." . . . . "Edition Peters." . .