La Jirafa

This book introduces you to hippopotamuses, including their size, diet and everyday behavior, which highlights differences between those in the wild and those living in a zoo habitat.

This book introduces the reader to the nighttime world of the rat, including its habitat, activities, diet, and the unique things that it does.

An introduction to ostriches, including their size, diet, and everyday behavior and highlighting differences between those in the wild and those living in zoos.

Flok es un espíritu. Hay espíritus que cuidan de las cosas importantes, como de que el viento no rompa los árboles. Y los hay que cuidan de las cosas poco importantes, como de que las arañas encuentren un buen sitio para hacer sus telas. Flok es un espíritu que cuida de cosas de poca importancia. Esta es una historia sobre el ingenio y la importancia de los seres que parecen poco importantes.

Through bright images, charts and graphs, and Spanish-translated informational text, this book provides readers with enlightening facts about what it takes to work in this exciting and unique profession. Featuring a glossary of terms, an index, a list of helpful websites, and an interview with a real-life deep sea fisher, this text will engage children from cover to cover!

Deserts may seem like harsh, uninhabitable places, but they support a diverse quantity of plant and animal life. And, they aren't always hot! Deserts serve an important role in Earth's existence, too. Readers learn about hot and cold deserts alike, as well as semi-arid and coastal deserts in this Spanish-translated title. From the Horned Lizard to the Saguaro cactus rooted in rich soil, the desert biome will amaze readers. This 6-Pack includes six copies of this title and a lesson plan.

Esta cuarta edición expone los fundamentos de las señales y sistemas discretos en el tiempo y procesamiento digital de señales. Este texto es adecuado para estudiantes de Ingeniería eléctrica, ingeniería informática y Ciencia de la computación.