Open Classroom in Natural Spaces: an Experience in the Ramón Álvarez Forest. Revista Electrónica Educare, [S. l.], v. 15, n. 1, p. 211–222, 2011. DOI: 10.15359/ree.15-1.16. Disponível em: https://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/893.. Acesso em: 18 may. 2024.