“Geotourism from Fuente De Cibeles of Madrid. History, Building Stones and Quarries”. Cadernos do Laboratorio Xeolóxico de Laxe. Revista de Xeoloxía Galega e do Hercínico Peninsular 42 (December 28, 2020): 69–94. Accessed July 27, 2026. https://revistas.udc.gal/index.php/CADLAXE/article/view/cadlaxe.2020.42.0.7286.