Preston, Alan. “The Puerto Rico Journal of Public Health and Tropical Medicine (1925-1949): Coverage of Tropical Sprue, Published in the P R Health Sci J 2023;42(2):91-101”. Puerto Rico Health Sciences Journal, vol. 43, no. 1, Mar. 2024, p. 58, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/3418.