1. Letter from Francis Crick to Aaron Klug Creator: Crick, Francis, 1916-2004 Date: 30 June 1977 Genre: Letters (correspondence)
2. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 31 May 1977 Genre: Letters (correspondence)
3. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 6 April 1977 Genre: Letters (correspondence)
4. Letter from Francis Crick to Aaron Klug [letter 1] Creator: Crick, Francis, 1916-2004 Date: 27 April 1977 Genre: Letters (correspondence)