He thought that these different year bearers were based on the solar years in which they were initiated .
Munro S. Edmonson studied 60 mesoamerican calendars and found remarkable consistency in the calendars , except for a number of different year bearer systems .
Munro S. Edmonson thought that these different year bearers were based on the solar years in which they were initiated .
Munro S. Edmonson studied 60 mesoamerican calendars and found remarkable consistency in the calendars , except for a number of different year bearer systems .