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Herrera, A. 2003. The Golden Serpent and the Inkas: Inka Occupation in the Upper Marañón and the Ferry Port of Pogtán. Boletín de Arqueología PUCP. 7 (Apr. 2003), 189-215. DOI:https://doi.org/10.18800/boletindearqueologiapucp.200301.008.