Microworld-type Ethnoeducational Computer Materials to Support the Teaching of Nasa-Yuwe - Recommendations from a Software Engineering Disciplines Viewpoint for Constructing Microworld-type Ethnoeducational Materials Aimed at Supporting Nasa Yuwe Language Teaching. - Luz Marina Sierra; Edinson Alfonso Solarte Camayo; Jorge Armando Villegas; Tulio Rojas Curieux; Erwin Meza Vega (ICEIS (2), 2013)