BIBLIOGRAPHY
Bibliography
http://ucs.byu.edu/bioag/BIO1000/
McTavish, Douglas
Journey through Science pp. 50-51
New York, NY reed books
1992
Headlam, Catherine
Science Encyclopedia, pp.317
Italy, Kingfisher
1992
Morris, Christopher
Dictionary of Science and Technology, pp. 1477, 1431
California, San Diego; Academic Press
