In what period did the timetable invented?
During what period did the schedule first developed?
In what period did the schedule emerge?
In which period did the schedule originally devised?
During what period was the schedule firstly envisioned?
In what period did the timetable firstly devised?
In what period was the schedule creation?
During what period was the schedule emerge for the first time?
- 04/13/01:39
- The Mesoamerican Calendar Ancient Shared Time Keeping
