Oscar Janiere Martínez Ruiz. “SCHOOL DISEASES IN COPAINALÁ, CHIAPAS (1880-1926)”. IJRDO - Journal of Social Science and Humanities Research 12, no. 1 (April 3, 2026): 43-55. Accessed August 27, 2026. https://ijrdosshr.com/index.php/sshr/article/view/6621.