Chapter 6, 16 September 1957
Nadia Boulanger
Igor & Vera Stravinsky
Bibliothèque nationale
16 September 1957
Telegram
Chapter 4, 11 September 1951
Igor & Vera Stravinsky
Nadia Boulanger
Paul Sacher Stiftung
11 September 1951
Letter
Chapter 6, 2 September 1958
Igor Stravinsky
Nadia Boulanger
Paul Sacher Stiftung
2 September 1958
Letter