1. Letter from Francis Crick to Ernst Mayr Creator: Crick, Francis, 1916-2004 Date: 21 April 1971 Genre: Letters (correspondence)
2. Letter from Francis Crick to Lord Charles Percy Snow Creator: Crick, Francis, 1916-2004 Date: 17 April 1969 Genre: Letters (correspondence)
3. Letter from Francis Crick to John T. Edsall, Fogarty International Center Creator: Crick, Francis, 1916-2004 Date: 22 February 1971 Genre: Letters (correspondence)