1. Primera Fase: La Investigación Universidad Nacional Abierta Y a Distancia - UNAD. In Articulating education in Tolima: urban and rural institutions articulated with Higher Education; Vargas Hurtado, G. I., Ed.; Social Sciences, Arts and Humanities; Sello Editorial UNAD: Colombia,CO, 2017; pp. 15-33. https://doi.org/10.22490/.