Ancient Maya Astronomical Tables from Xultun, Guatemala David Stuart Franco D Rossi 2012, ScienceAncient Maya Astronomical Tables from Xultun, Guatemala David Stuart Franco D Rossi 2012, Science

https://www.academia.edu/2645762/Ancient_Maya_Astronomical_Tables_from_Xultun_Guatemala?rhid=29698883681&swp=rr-rw-wc-94934045