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The top documents tagged [system calendars quipu]
900 A.D. – 1,520 A.D. 1. Mayans (1,500 B.C. – 1,546 A.D.) Toltec (900 A.D. – 1,200 A.D.) Aztecs (1,200 A.D. – 1,521 A.D.) Incas (1,200 A.D. – 1,535 A.D.)
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