Supernormal Science, Yoga, and the Evidence for Extraordinary Psychic Abilities Radin Dean Heftet / 2013 / Engelsk
Electromagnetic Brain EM Field Theories on the Nature of Consciousness Joye, Shelli Renée Heftet / 2021 / Engelsk
From Outer Space to Inner Space An Apollo Astronaut's Journey Through the Material and Mystical Worlds Mitchell, Dr. Edgar Heftet / 2022 / Engelsk
