Ribera, Oleguer. “Les Concessions Mineres I l’estudi Del Territori (1869-1944)”. Treballs de la Societat Catalana de Geografia, no. 82 (December 16, 2017): 223–236. Accessed May 1, 2024. https://revistes.iec.cat/index.php/TSCG/article/view/142843.