Editorial 56-3
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Copyright (c) 2017 Andrea Bustos Ibarra
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
The authors grant an exclusive licence, without time limit, for the manuscript to be published in the Perspectiva Educacional journal, published by the Pontificia Universidad Católica of Valparaíso (Chile), through the School of Pedagogy.