The following web pages were used:
 

    www.ee.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html

    www.xahlee.org

    www.sunflowergal.com

    www.geocites.com/capecanaveral/station/88228

    www.groups.dos.stand.ac.uk/~history/mathematicians
 

The follwing books were used:
 

    Boles, Martha.  The Golden Relationship:Art, Math, and Nature.  Massachusetts:
        Pythagorean Press, 1992.

    Garland, Trudi Hammel.  Fascinating Fibonaccis. California: Dale Seymour Publications, 1987.

    Thompson, D'Arcy Wentworth.  On Growth and Form. Cambridge: University Press, 1943.