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  • Calendars through the Ages. The Mayan Calendar. http://webexhibits.org/calendars/calendar-mayan.html
  • Carstensen, Jean. "Mayan Cultural Resurgence." Whole Earth Review. Fall, 1991.
  • Garcia, ­Hernán and Sierra, Antonio. Wind in the Blood. North Atlantic Books, 1999.
  • Jenkins, John Major. "The How and Why of the Mayan End Date in 2012 A.D." Originally published in Mountain Astrologer. Dec.-Jan. 1995. http://levity.com/eschaton/why2012.html
  • Joseph, Lawrence E. Apocalypse 2012. Morgan Road Books, 2007.
  • Kostura, John. Mayan Long Count Calculator. http://www.2near.com/edge/maya
  • The Maya Calendar.
    http://www.mayacalendar.com/
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    http://www.mayan-calendar-code.com
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    http://www.hanksville.org/yucatan/longcount.html
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