Cevallos Becerra, ClaudioMorocho Pintado, AnaPiedra Rivas, CeciliaVelasco Piedra, María2014-07-022014-07-022003http://dspace.ucuenca.edu.ec/handle/123456789/17454application/pdfspaopenAccesshttp://creativecommons.org/licenses/by-nc-sa/3.0/ec/Rio TutupaliMicrocuencabachelorThesis