1. MS Mus. 1813/2/1/261 Reference (shelfmark): MS Mus. 1813/2/1/261 Title: Iannis Xenakis: General files, 1965–1970. Part 1 of 2. Scope & Content: Rufina Ampenoff's files. Correspondence and papers involving or relating to the production of Iannis Xenakis' works. Collection Area: Music Collections Languages: English, French, and German Date Range: 1964-1968 Extent: 1 box (4 folders, 4 sub-files)
2. MS Mus. 1813/2/1/262 Reference (shelfmark): MS Mus. 1813/2/1/262 Title: Iannis Xenakis: General files, 1965–1970. Part 2 of 2 Scope & Content: Rufina Ampenoff's files. Correspondence and papers involving or relating to the production of Iannis Xenakis' works. Collection Area: Music Collections Languages: English, French, German, and Italian Date Range: 1965-1970 Extent: 1 box (4 folders, 11 sub-files)
3. MS Mus. 1813/2/1/263 Reference (shelfmark): MS Mus. 1813/2/1/263 Title: Iannis Xenakis: General Production file, part 1 of 2 Scope & Content: Papers and correspondence, mainly internal, regarding the production of Boosey & Hawkes' publication of Iannis Xenakis' works: the first of two parts. Collection Area: Music Collections Languages: English, French, German, and Polish Date Range: 1966-1976 Extent: 1 box (4 folders, 15 sub-files)
4. MS Mus. 1813/2/1/264 Reference (shelfmark): MS Mus. 1813/2/1/264 Title: Iannis Xenakis: General Production file, part 2 of 2 Scope & Content: Papers and correspondence, mainly internal, regarding the production of Boosey & Hawkes' publication of Iannis Xenakis' works: the second of two parts. Collection Area: Music Collections Languages: English, French, and German Date Range: 1967-1974 Extent: 1 box (2 folders, 7 sub-files)