El dinero y el comercio en nuestro mundo: Read-Along eBook

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

Through innovation and imagination, savvy entrepreneur Richard King became a towering figure in the Texas cattle industry. The King Ranch, which continues to flourish today, is a symbol of his enduring legacy.

This Book Explains The Water Cycle And How Water Is Used To Generate Many Forms Of Electricity. It Introduces Students To The Importance Of Keeping Our Water Supplies Clean. Has Detailed Information About The Effects Water Has On Different Formations On Our Earth. From Weathering To Landslides, It Can All Be Found In This Title.

Antes era válido acusar a quienes historiaban el pasado de consignar únicamente las «gestas de los reyes». Hoy día ya no lo es, pues cada vez se investiga más sobre lo que ellos callaron, expurgaron o simplemente ignoraron. «¿Quién construyó Tebas de las siete puertas?», pregunta el lector obrero de Brecht. Las fuentes nada nos dicen de aquellos albañiles anónimos, pero la pregunta conserva toda su carga (Carlo Ginzburg).