^Hartston, William (2017). "Who built thousands of giant stone wheel-like structures in the Middle East?". The Bumper Book of Things That Nobody Knows. London: Atlantic Books. pp. 383–4.
ISBN978-1-78649-998-1.
^Hartston, William (2017). "Who built thousands of giant stone wheel-like structures in the Middle East?". The Bumper Book of Things That Nobody Knows. London: Atlantic Books. pp. 383–4.
ISBN978-1-78649-998-1.