Un día en... el Imperio Romano (Un día en...)

Everyone has to be responsible for themselves. Let's explore ways to show responsibility! The Me Pregunto (I Wonder) series is perfect for young learners in prekindergarten through grade 2. These 16-page books give readers an accessible introduction to nonfiction reading. Color photographs and fun, factual examples will grab the attention of young readers and help strengthen reading comprehension skills.

Groups of American Indians had been living in the Texas region for thousands of years when American settlers decided to expand westward. This captivating book has been translated into Spanish and explores the history of American Indians in Texas and how each group found different ways to live in the region they inhabited. Readers will learn about a variety of tribes, including Karankawa tribe, Jumano, Caddo, Lipan Apache, and Shoshone and discover how they struggled to survive European colonization, the Indian Removal Act, and American expansion. Other topics include the Dawes Act, Indian...

El famoso escritor Cósimo Herrera, eterno candidato a un Nobel que no llega nunca, decide retirarse a Ribanova, una pequeña ciudad de provincias apartada y brumosa. Allí conocerá a Luisa, una muchacha veinte años más joven, y que desde el primer momento sentirá por el forastero un amor tan apasionado como imposible.

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.