11. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 18 September 1979 Genre: Letters (correspondence)
12. Letter from Francis Crick to Francois Gros Creator: Crick, Francis, 1916-2004 Date: 19 March 1969 Genre: Letters (correspondence)
13. Letter from Francis Crick to John Red Raper, Harvard University, The Biological Laboratories Creator: Crick, Francis, 1916-2004 Date: 11 March 1955 Genre: Letters (correspondence)
14. Letter from Francis Crick to Luigi Silvestri Creator: Crick, Francis, 1916-2004 Date: 24 November 1971 Genre: Letters (correspondence)
15. Letter from Francis Crick to Charlotte Friend Creator: Crick, Francis, 1916-2004 Date: 18 September 1979 Genre: Letters (correspondence)
16. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 9 October 1979 Genre: Letters (correspondence)
17. Circular letter from the European Committee of Scientists for Democracy in Greece Creator: European Committee of Scientists for Democracy in Greece Date: [1969] Genre: Letters (correspondence)
18. Evidence for the Pauling-Corey alpha-Helix in Synthetic Polypeptides [Editorial letter] Creator: Cochran, WilliamCrick, Francis, 1916-2004 Date: 9 February 1952 Publisher: Nature Publishing Group Genre: ArticlesLetters (correspondence)