Mysteries of the unknown /
- Virginia : Time-life, 1987.
- 15 copies.illustrations (some color) ; 32 cm.
The UFO phenomenon -- Secrets of the alchemists -- Time and space -- Utopian visions -- Mysterious lands and peoples -- Cosmic duality -- Eastern mysteries -- Search for immortality -- Alien encounters -- Master index and illustrated symbols. Responsibility: by the editors of Time-Life Books.