Hernández Cardona, Xavier, David Íñiguez Gracia, and Rafel Sospedra Roca. “EBRO 1938. History, Archeology and Teaching of an Aerial Battle”. Clio. History and History Teaching, no. 46 (December 21, 2020): 263–282. Accessed December 7, 2025. https://papiro.unizar.es/ojs/index.php/clio/article/view/5272.