El mundo de la tecnología: Los inventos del siglo XX (Tech World: 20th Century Inventions)

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

En las p ginas de esta obra se escucha la voz del mism simo Leonardo Da Vinci que, con el encanto de su desorden genial, presenta su vida, se critica y confiesa sus debilidades y frustraciones. el libro est ilustrado con bellas reproducciones de pasajes de la vida de Da Vinci y de sus obras.

A thoughtful discussion of violence in schools, complete with examples of incidents and suggestions for coping.

Presents commonly used Spanish words and phrases accompanied by illustrations of situations in which to use the newly acquired language.