The grinding slab from Copacabana (36 x 29.2 cm) of the southern "early" version of the Yaya-Mama style, showing motifs and designs similar to those on the Chiripa grinding slab. Drawing by Sergio Chávez from photographs provided by Margaret Young-Sánchez and the Museum für Völkerkunde.
Isbell, William H.; Uribe, Mauricio I.; Tiballi, Anne; Edward P. Zegarra, 2018, "Visual database", https://doi.org/10.25346/S6/1B33FN.