Pereira Pérez, Ana, and Nuria Mairena Rodríguez. “Education and Nature Conservation: An Urgent Alliance”. Revista Electrónica Educare 15, no. 2 (November 28, 2011): 221-230. Accessed March 5, 2021. https://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/1968.