Sánchez Delgado, Marcelo. “The Racial Hygiene Explained to the Chileans: The Conferences of Otto Aichel (1927) and Erwin Baur (1930) in Santiago De Chile”. Revista de Historia Social y de las Mentalidades 22, no. 2 (January 18, 2019): 225–246. Accessed November 7, 2025. https://www.revistas.usach.cl/ojs/index.php/historiasocial/article/view/3649.