00722nam a2200169Ia 450000500170000000800410001702000180005804100080007608200090008410000220009324500240011526400270013930000190016652003470018565000060053265500140053820260914083118.0260914s9999    xx            000 0 und d  a0-7554-3408-0  aeng  a923.1 aFREDERICK, Robert10a100 Great Inventors  bRobert Frederickc2005  a45 hlm.c29 cm  aEver wondered how our life would be without electric bulbs, fans and radios? Can you imagine a world without televisions sets and computers? How did people beat the heat without air conditioners and travel without cars?  Read more about their fascinating lives and intersting stories that led to the incredible inventions listed in this book. 4a0  aGrade 7-9