Chester, Tom. "Mountain Lion Attacks On People in the U.S. and Canada."
http://tchester.org/sgm/lists/lion_attacks.html. Internet. 26 Oct. 2001.
Kher, Unmesh. "Electronic Noses Sniff Out a Market or Two." March 20, 2000. Time
Magazine, Online. 29 Nov. 2000.
Searle, Bobbi. Inside A Computer. Italy: Grolier Educational, 2001.
Wright, David. Inventors & Inventions Computers. New York: Benchmark Books, 1986.