Ramírez Jiménez, David. “The Chancery of the Spanish First Secretary of State and of the Office - Department of State, During the Reign of Isabel Ii (1833-1868): Introduction to His Study”. Documenta & Instrumenta - Documenta et Instrumenta 9 (January 13, 2012): 61–73. Accessed July 15, 2026. https://revistas.ucm.es/index.php/DOCU/article/view/38065.