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Drawings of microdrills and perforators from the Lohmann site.
Esarey, D. and T. R. Pauketat 1992. The Lohmann Site: An Early Mississippian Center in the American Bottom. American Bottom Archaeology, FAI-270 Site Reports Vol. 25. University of Illinois Press. Fig 10.1 p.135
Image courtesy of the Board of Trustees of the University of Illinois and the Illinois Transportation Archaeological Research Program.