1. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 28 September 1976 Genre: Letters (correspondence)
2. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 12 October 1976 Genre: Letters (correspondence)
3. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 31 May 1977 Genre: Letters (correspondence)
4. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 6 April 1977 Genre: Letters (correspondence)