Langer, Erick D. “Indian Trade and Ethnic Economies in the Andes, 1780-1880”. EIAL - Estudios Interdisciplinarios de América Latina y el Caribe 15, no. 1 (January 21, 2004). Accessed February 19, 2025. https://eialonline.org/index.php/eial/article/view/825.