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, vol. 22, no. 2, Jan. 2019, pp. 225-46, https://journals.usach.cl/ojs/index.php/historiasocial/article/view/3649.