bibliography

http://inventors.about.com/library/inventors/bltelephone.htm

http://atcaonline.com/phone/

http://www.gsmserver.com/cellphones/nokia/Nokia_2310.php

http://www.pbs.org/wgbh/amex/telephone/timeline/f_timeline.html

http://library.thinkquest.org/03oct/00181/main-6.html

http://marsrovers.nasa.gov/mission/