Early Maize Agriculture and Interzonal Interaction in Southern PeruDOI: info:10.1038/nature04294v. 440No. 708076–79
Perry, Linda, Sandweiss, Daniel H., Piperno, Dolores R., Rademaker, Kurt, Malpass, Michael A., Umire, Adán, and de la Vera, Pablo. 2006. "Early Maize Agriculture and Interzonal Interaction in Southern Peru." Nature, 440, (7080) 76–79. https://doi.org/10.1038/nature04294.