Johnson's Bibliographic Reference
Source Document Title
Buffalo robe calendars recorded the "Winter count" which recorded the first snowfall of the current year to the first snowfall of the next year. The Lakota people put one mark that symbolized the most important winter event of that year. Only one person was the "keeper of the count" and was always a man. The Kiowas put both one mark for winter and a second mark for summer; their calendars recorded more events than those of the Lakota.