1
article
by Gonzalez Tejada, Marjorie Jannina; Perez Icaza, Mariuxi Elizabeth; Vaca Viteri, Maria Soledad; Loor Valdiviezo, Kleber
Published in 2009
Repository Repositorio Escuela Superior Politécnica del Litoral
2
article
Published in 2009
Repository Repositorio Escuela Superior Politécnica del Litoral