Underworld review by Duncan Edlin.
Underworld review by R. Avry Wilson.
Underworld review by Ward Sanford, an Hydrogeologist with the U. S. Geological Survey.
Underworld review by Peter James (New Scientist).
Review of Underworld by Dr. David Frawley, Vedic and yogic scholar, entitled Underworld: Flooded Kingdoms of the Ice Age - A Vedic and India Perspective
Review of Underworld posted on Daily Grail
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