978-9978-43-096-5 | Mis números para cuarto grado de educación básica | Cámara Ecuatoriana del Libro - Núcleo de Pichincha | Angel Terán Bernal Norma Basantes Rodríguez Luis Gilberto Jácome Yépez | 2003 |
978-9978-82-487-0 | Playing English Workbook (First Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |
978-9978-82-492-4 | Playing English Workbook (Second Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |
978-9978-82-493-1 | Playing English Workbook (Third Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |
978-9978-82-494-8 | Playing English Workbook (Fifth Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |
978-9978-82-495-5 | Playing English Workbook (Sixth Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |
978-9978-82-497-9 | Playing English Workbook (Fourth Level) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa Flavio Washington Muñoz Mejía Luis Gilberto Jácome Yépez | 1994 |