Kenyon, J. D. Forbidden history: Prehistoric technologies, extraterrestrial intervention, and the suppressed origins of civilization.
Cita Chicago (17th ed.)Kenyon, J. Douglas. Forbidden History: Prehistoric Technologies, Extraterrestrial Intervention, and the Suppressed Origins of Civilization.
Cita MLA (9th ed.)Kenyon, J. Douglas. Forbidden History: Prehistoric Technologies, Extraterrestrial Intervention, and the Suppressed Origins of Civilization.
Atenció: Aquestes cites poden no estar 100% correctes.