Personal communication with author, 1999. In particular see: Thomas E. Bullard, "UFOs: Lost in the Myths," in <cite>UFOs and Abductions: Challenging the Borders of Knowledge</cite>, ed. David M. Jacobs (University Press of Kansas, 2000), 141-191. Also: Thomas E. Bullard, <cite>The Myth and Mystery of UFOs</cite>, (University Press of Kansas, 2010).