1. Letter from Francis Crick to Andre Lwoff, Institut Pasteur (France) Creator: Crick, Francis, 1916-2004 Date: 25 September 1957 Genre: Letters (correspondence)
2. Letter from Andre Lwoff, Institut Pasteur (France) to Francis Crick Creator: Institut Pasteur (Paris, France)Lwoff, Andre, 1902- Date: 13 September 1957 Genre: Letters (correspondence)