Sparse Pre-Columbian Human Habitation in Western AmazoniaDOI: info:10.1126/science.1219982v. 336No. 6087American Association for the Advancement of Science1429–1431
McMichael, Crystal H., Piperno, Dolores R., Bush, M. B., Silman, M. R., Zimmerman, A. R., Raczka, M. F., and Lobato, L. C. 2012. "Sparse Pre-Columbian Human Habitation in Western Amazonia." Science, 336, (6087) 1429–1431. https://doi.org/10.1126/science.1219982.