Боги, построившие пирамиды

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Robert М. Schoch, «Geological Evidence Pertaining to the Age of the Great Sphinx», in Emilio Spedicato and Adalberto Notarpietro, eds., New Scenarios on the Evolution of the Solar System and Consequences on History of Earth and Man, Proceedings of the Conference, Milano and Bergamo, June 7-9th, 1999 (Milan: Universita degli Studi di Bergamo, Quaderni del Dipartmento di Matematica, Statistica, Informatica ed Applicazion, Serie Miscellanea, 2003), 171–203.