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Ancient Calendars and Bolivian Modernity: Tiwanaku's Gateway of the Sun, Arthur Posnansky, and the World Calendar Movement of the 1930s - Sammells - 2012 - The Journal of Latin American and Caribbean
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Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute
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PDF) Tiahuanaco monuments (Tiwanaku / Pumapunku) in Bolivia are made of geopolymer artificial stones created 1400 years ago
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PDF) A Radiocarbon Chronology of the Pumapunku Complex and A Reassessment of the Development of Tiwanaku, Bolivia | Alexei Vranich - Academia.edu
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Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute
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