Guillén Correas, Roberto, and Carlos Peñarrubia Lozano. 2013. “Incorporación De Contenidos De Actividades En El Medio Natural Mediante La investigación-acción Colaborativa (Integration of Activities in the Natural Environment As Contents of Education Trhough Collaborative Action-Research)”. Retos 23 (January): 23-28. https://doi.org/10.47197/retos.v0i23.34562.