1
bachelorThesis
by Saldaña Guiracocha, Sandra Beatriz; Sánchez Guachún, Silvia Alexandra; Tuquiñahui Paute, Silvia Patricia
Published in 2007
Repository Repositorio Universidad Politécnica Salesiana
2
bachelorThesis
Published in 2011
Repository Repositorio Universidad Politécnica Salesiana