Culver, William C., y Cornel Reinhart. «The Douglas Report: Chilean Mining and Its Political Representation in 1871». Si Somos Americanos 4, no. 3 (junio 30, 2003): 79–102. Accedido junio 15, 2024. https://sisomosamericanos.cl/index.php/sisomosamericanos/article/view/795.