Bibliography

    If you're looking for further information, here are some books and other supplies for you to use today.   

      Aasena, Nathan. Twentieth Century Inventors.  New York: Facts on File, Inc: 1991. 

   Amato, Carol.   Breakthroughs in Science: Inventions.  New York: Michael Friedman Publishing: 1992

    Kozar, Richard.  Inventors and Their Discoveries.  Chelsea HousePublishers: 1999

    National Geographic Book Service Inventors and Discoveries: Changing our World. Washington D.C.:   National Geographic Society: 1999

   William, Trevor 1.  The History Of Inventions from Stone Aves To Silicon Chips.  New York.  Facts on File Inc:1987