Manual para el Trabajo Social Comunitario

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.

This fantastic book for young readers explains how it all began--from what is in the universe and the solar system; what galaxies, stars, the sun, and the planets are; when the practice of astronomy began, what an astronaut is, and how they live in space. It serves as a fascinating and useful illustrated guide for kids.

Introduces Iran, including the geography, people, education, rural and urban life, housing, food, work, and amusements, along with other information about the country.

This illustrated book for children and youths explores the design and history of telescopes, advances in telescope technology, and the structure of the space telescope Hubble. It also includes information on other telescopes like the Subaru, the Gemini, and robotic telescopes, and on observatories.