1. Letter from James D. Watson to Francis Crick Creator: Watson, James D., 1928- Date: 12 April 1958 Genre: Letters (correspondence)
2. Letter from Francis Crick to Aaron Klug Creator: Crick, Francis, 1916-2004 Date: 4 April 1959 Genre: Letters (correspondence)
3. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 13 February 1959 Genre: Letters (correspondence)