Escudero, Antonio, and Andrés Sánchez Picón. 2018. “Spanish Lead at the Beginning of the 20th Century: A Competitiveness Analysis Based on Records from the Crédit Lyonnais Bank”. Revista De Historia Industrial — Industrial History Review 26 (69):17-48. https://revistes.ub.edu/index.php/HistoriaIndustrial/article/view/21500.