1. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 16 January 1961 Genre: Letters (correspondence)
2. DNA Creator: Crick, Francis, 1916-2004 Date: 1961 Publisher: Charles C. Thomas, Publisher Genre: Articles
3. Letter from Francis Crick to Jacques Monod Creator: Crick, Francis, 1916-2004 Date: 31 December 1961 Genre: Letters (correspondence)