Vallina Rodríguez, Alejandro, Ángel Ignacio Aguilar Cuesta, and Laura García Juan. “Application in Descriptive Geography Subjects of the PBL Teaching Methodology”. Enseñanza & Teaching: Interuniversity Journal of Didactic 36, no. 2 (December 19, 2018): 51–70. Accessed July 18, 2024. https://revistas.usal.es/tres/index.php/0212-5374/article/view/et20183625170.