Photograph of the only excavated and dated decorated pestle from the Achachi Coa Khollu sector of Kala Uyuni in the Taraco Peninsula (Cohen and Roddick 2007:57, Figures 6.15-6.16). Photograph courtesy of Christine Hastorf.
Isbell, William H.; Uribe, Mauricio I.; Tiballi, Anne; Edward P. Zegarra, 2018, "Visual database", https://doi.org/10.25346/S6/1B33FN.