Desarrollo de proyectos de instalaciones de energía mini-eólica aislada

In 1846, travelers heading for California became trapped high in the mountains of the Sierra Nevada. Snowdrifts surrounded their shelters, and food supplies dwindled. How they stayed alive remains one of the most gruesome stories in US history. However, some facts that have come to light recently through archaeological digs will surprise even those who think they know the story. This gripping book, including maps and images of the era, tells the true account of the doomed Donner party.

It is July 4 and you are going to see the fireworks. But do you know why? It's Independence Day! Turn the pages of this book to find out why our country had to win its freedom, what happened on July 4, 1776 that makes this day special, why we watch fireworks on July 4. Each book in the Holiday Histories series describes one of America's holidays or special days. Explore the history of each day and learn the real reason why it is important. Discover what special meaning each day might have for you.

Learn how engineers are racing to save the city of Venice from sinking and flooding. This Spanish STEAM reader features a hands-on STEAM challenge and uses real-world examples to teach problem solving.

"El japon's es complicado" Pues, empieza a aprenderlo de la manera m's didactica con este libro que toma ejemplos de manga.