Inventions Explained: A Beginner's Guide to Technological Breakthroughs (The "Your World Explained" Series)

By Richard Platt

With an in-depth look at the earliest of tools, and advancing through time and technology to highlight systems of measuring, transportation, energy, medicine, machinery, computing, and more,... This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: 0805048766
• ISBN13: 9780805048766
• Release Date: November 1997
• Publisher: Henry Holt and Co.
• Length: 72 Pages
• Weight: 1.15 lbs.
• Dimensions: 9.4" x 0.5" x 9.3"
• Age Range: 8 to 12 years
• Grade Range: Grades 3 to 7