300 Million Year Old Fossilized Human Prints Found (sources)

  • "Footmarks in Kentucky," letter from E. A. Allen to The American Antiquarian and Oriental Journal, Vol. 7, No. 1, January 1885 Chicago, Illinois, USA. Pg. 39


  • Mysteries of the Unexplained, by Reader's Digest Association, 1982 Pleasantville, New York, USA, & Montreal, Canada. ISBN: 0-89577-146-2. Pg. 35