NOTES FROM THE HANGAR (VOL 1, NO 1): THE UNDERGROUND BASE AT DULCE, SCIENTOLOGY, WILHELM REICH, AND THE BIOLOGICAL THEORY OF UFOS BY JIM KEITH (1991)
MYSTERIES: AN INVESTIGATION INTO THE OCCULT, THE PARANORMAL, AND THE SUPERNATURAL BY COLIN WILSON (1978)
ANTHROPOLOGY: EARTH AND THE UNIVERSE TIME TRACK – ACCORDING TO L. RON HUBBARD BY MIKE AND VIRGINIA MCCLAUGHRY (2008)
THE CENTRAL INTELLIGENCE AGENCY AND OVERHEAD RECONNAISSANCE: THE U-2 AND OXCART PROGRAMS, 1954-1974 (1992)
SUPERNATURAL RELIGION : AN INQUIRY INTO THE REALITY OF DIVINE REVELATION BY WALTER RICHARD CASSELS (1874)