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)
UFOS AND THE EXTRATERRESTRIAL CONTACT MOVEMENT: A BIBLIOGRAPHY/VOL ONE & UNIDENTIFIED FLYING OBJECTS/VOL TWO : THE EXTRATERRESTRIAL CONTACT MOVEMENT BY GEORGE M. EBERHART (1986)
UFOS AND RELATED SUBJECTS: AN ANNOTATED BIBLIOGRAPHY BY LYNN E. CATOE, LIBRARY OF CONGRESS, DEFENSE TECHNICAL INFORMATION CENTER (1969)
THE HERMETIC AND ALCHEMICAL WRITINGS OF AUREOLUS PHILIPPUS THEOPHRASTUS BOMBAST, OF HOHENHEIM, CALLED PARACELSUS THE GREAT VOL I-II BY PARACELSUS; ARTHUR EDWARD WAITE (1984)
SUBTERRANEAN WORLDS: 100,000 YEARS OF DRAGONS, DWARFS, THE DEAD, LOST RACES AND UFOS FROM INSIDE THE EARTH BY WALTER KAFTON-MINKEL (1989)