Rigau-Pérez, José G., and Evelyn D. Vallejo-Calzada. 2020. “Measles, Malnutrition and Mortality: Puerto Rico, 1917-1918”. Puerto Rico Health Sciences Journal 39 (1):20-27. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1996.