“El Sol de Sinaloa and political violence in Mexico during 1972: the case of Los Enfermos of UAS” (2018) Letras Históricas E-ISSN: 2448-8372 [Preprint], (18). Available at: https://letrashistoricas.cucsh.udg.mx/index.php/LH/article/view/6329 (Accessed: 21 September 2026).