Calderón Roca B. Approach to the use of primary documentary sources in the ESO. A didactic proposal based on the economic crisis of 1917 in Malaga. Clio [Internet]. 2021 Dec. 20 [cited 2026 Jan. 1];(47):276-94. Available from: https://papiro.unizar.es/ojs/index.php/clio/article/view/6148