Van Helden, Albert. “Ptolemaic System.” Available on-line. URL:
http://es.rice.edu/ES/humsoc/Galileo/Things/ptolemaic_system.html.
Accessed November 2, 2002.
Weisstein, Eric. World of Mathematics.Available on-line. URL:
http://mathworld.wolfram.com.
———. World of Science.Available on-line. URL: http://scienceworld.
wolfram.com. Accessed November 2, 2002.
Wilson, Fred L. “History of Science: Galileo and the Rise of Mechanism.”
Available on-line. URL: http://www.rit.edu/~flwstv/galileo.html. Accessed
November 2, 2002.
Who What When: Interactive Historical Timelines. Available on-line. URL:
http://www.sbrowning.com/whowhatwhen/index.php3?q=12&pid=604.
Accessed November 2, 2002.
xrefer: the Web’s Reference Engine. “Number Theory.” Available on-line. URL:
http://www.xrefer.com/entry/511441. Accessed November 2, 2002.
Recommended Reading and Useful Websites APPENDIX
Recommended Reading and Useful Websites APPENDIX