Gómez de Salazar, J. M., M. I. Barrena, and A. Soria. “Roman Technology Used in the Manufacture of a Cowbell”. Revista de Metalurgia 41, no. Extra (December 17, 2005): 412–416. Accessed April 16, 2024. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/1066.