Fenner, Justus. “Debt Peonage (enganche) and Free Labor. Debts and Incomes on the Perú-París Coffee Plantation, Chiapas, México (1919-1941)”. Revista de historia., no. 85 (January 1, 2022): 289–325. Accessed April 24, 2026. https://www.revistas.una.ac.cr/index.php/historia/article/view/16457.