SOURCES
http://www.mayacalendar.com/mayacalendar/f-origen.html
http://www.webexhibits.org/calendars/calendar-mayan.html
http://mathdl.maa.org/images/cms_upload/MayaTimeCycles2-143624.pdf
http://www.timeanddate.com/calendar/mayan.html
http://www.lost-civilizations.net/mayan-history.html
http://www.webexhibits.org/calendars/calendar-mayan.html
http://mathdl.maa.org/images/cms_upload/MayaTimeCycles2-143624.pdf
http://www.timeanddate.com/calendar/mayan.html
http://www.lost-civilizations.net/mayan-history.html