Roberto Clemente

Describes how the rig was built, how it stands out in the water, and how much drilling it does in a day.

Consciente de la eficacia literaria y de la popularidad de Tom Sawyer y Huckleberry Finn, Mark Twain tomó la pluma varias veces para ponerlos en campaña a correr aventuras como don Quijote y Sancho. Pero, como él mismo cuenta, eran caprichosos, y a veces se mantenían en sus trece, sin que nadie pudiera «persuadirlos jamás de lo contrario». Este volumen recoge las tres tentativas frustradas en que sus personajes se negaron a abandonar el tintero y el cajón del escritorio. Traducidas por vez primera, ofrecemos al lector las aventuras inacabadas de Huck y Tom entre los indios, así como...

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.

When people go to sleep, bats are just waking up. While young readers may recognize the image of bats in the night skies, where they live may be less familiar. This title takes readers inside bat roosts to uncover the fascinating facts about this creature. Readers will learn the basics of bat roosts—in caves and beyond—and how they help bats survive in the wild. The text also looks at bat’s appearance, behavior, and the crucial role they play in nature’s ecosystems—topics covered in most elementary science curricula. Diagrams, fact boxes, colorful images encourage learning.