Álvarez Domínguez, J.-M. 2022. Socio-demographic study of Leoneses migrants in mexico through their files in the "Registro Nacional de Extranjeros" (196-1950). Añada: revista d’estudios llioneses. 4 (Dec. 2022), 53–70. DOI:https://doi.org/10.18002/ana.i4.7633.