González Miranda, Sergio, Renato Calderón Gajardo, and Pablo Artaza Barrios. “The End of the Expansion Cycle of Saltpeter in Chile: The Inflection of 1919 As a Structural Crisis”. Revista de Historia Industrial — Industrial History Review 25, no. 65 (December 15, 2016): 83–110. Accessed March 13, 2025. https://revistes.ub.edu/index.php/HistoriaIndustrial/article/view/21232.