Frequencies of vessel shapes and temper for Cahokia tracts 15A and 15B ceramics.

Vogel, J.O. 1975. Trends in Cahokia ceramics: Preliminary study of the collections from tracts 15A and 15B. In Perspectives in Cahokia Archaeology, edited by J.A. Brown, pp. 32-125. IAS Bulletin No. 10. Table 3, p.41

Image courtesy of Illinois Archaeological Survey.