Braster, Sjaak, and María del Mar del Pozo Andrés. “Frank Simon: A Personal Story about Everyday Educational Realities”. Historia y Memoria de la Educación, no. 8 (June 27, 2018): 699–777. Accessed August 8, 2022. https://revistas.uned.es/index.php/HMe/article/view/22041.