Méndez Santos, Isidro E., Bárbara M. Carvajal Hernández, and Daemar Ricardo Marrero. 2018. “Basic Considerations on Competence-Based Training of Environmental Teachers”. Revista Luna Azul (On Line), no. 46 (January):350-68. https://doi.org/10.17151/luaz.2018.46.18.