1. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 18 July 1977 Genre: Letters (correspondence)
2. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 27 January 1977 Genre: Letters (correspondence)
3. Letter from Francis Crick to Aaron Klug Creator: Crick, Francis, 1916-2004 Date: 4 October 1977 Genre: Letters (correspondence)
4. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 31 October 1977 Genre: Letters (correspondence)