1. MS Mus. 1813/2/1/258-264 Reference (shelfmark): MS Mus. 1813/2/1/258-264 Title: Iannis Xenakis: Rufina Ampenoff's files Scope & Content: Correspondence and papers relating to the composer Iannis Xenakis (1922–2001), created or accumulated by Rufina Ampenoff (1912?–1993?). Collection Area: Music Collections Languages: English, French, German, Italian, and Polish Date Range: 1962-1978 Extent: 6 boxes, 1 envelope