1. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 5 March 1958 Genre: Letters (correspondence)
2. Letter from Francis Crick to Harold Frank Robinson, North Carolina State University Institute of Biological Sciences Creator: Crick, Francis, 1916-2004 Date: 21 February 1964 Genre: Letters (correspondence)
3. Letter from Francis Crick to H. Gobind Khorana Creator: Crick, Francis, 1916-2004 Date: 9 January 1967 Genre: Letters (correspondence)