1968 Más allá del Mito.

A fierce ogre finds that children are becoming too smart for him to catch and eat. Instead, he passes his time writing arithmetic problems to challenge the children.

De dochter van een Amerikaanse vrouw en een Chinese man groeit begin 20e eeuw op in Shanghai in de succesvolle club van haar moeder.

Este libro ilustrado para niños describe el ciclo de vida de la mariposa monarca, desde que la oruga sale del huevecillo, antes de convertirse en una crisálida, hasta que se transforma en adulto.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.