por Labinowicz, Ed [autor] | Lopez Pineda, Humberto [traductor] | Bustos Cobos, Felix [traductor] | Frazee, Susie Pollard [ilustrador].
por Labinowicz, Ed [autor] | Bustos Cobos, Felix [traductor] | Frazee, Susie Pollard [ilustrador] | Lopez Pineda, Humberto [traductor] | Labinowicz, Ed. Piaget primer, thinging-learning-teaching.