⁷³"Uriel's Machine." Knight-Lomas.Com. Web. 31 Jan. 2012. <http://www.knight-lomas.com/uriel.html>.
Knight, Christopher, and Robert Lomas. Uriel's Machine: Uncovering the Secrets of Stonehenge, Noah's Flood, and the Dawn of Civilization. Gloucester, MA: Fair Winds, 2001.