Unidad 16, Piso 3 (Grobman et al. 2011).
Grobman, Alexander, Duccio Bonavia, Tom D. Dillehay, Dolores R. Piperno, José Iriarte and Irene Holst 2011 Preceramic Maize from Paredones and Huaca Prieta, Peru. Proceedings of the National Academy of Sciences, U.S.A. 109(5):1755–1759.