Notes

1. John J. O'Conner and Edmund F. Robertson, "An Overview of Babylonian Mathematics," http://turnbull.dcs.st-and.ac.uk/history/HistTopics/Babylonian_mathematics.html (School of Mathematics and Statistics, University of St. Andrews, Scotland, accessed 2003 Sep 13).

2. "The Hanging Gardens of Babylon," http://ce.eng.usf.edu/pharos/wonders/gardens.html (Civil and Environmental Engineering, The University of South Florida, 2004 Jan 21, accessed 2004 Sep 3).

3. Denise Schmandt-Besserat, The History of Counting (Harper Collins, 1999 Aug 25).

4. Denise Schmandt-Besserat, How Writing Came About [Abridged] (Austin, TX: University of Texas Press, 1997).

5. Ivars Peterson, "From Counting to Writing," http://www.sciencenews.org/pages/sn_arc97/2_22_97/mathland.htm (Science News Online, 1997 Feb 22, accessed 2004 Sep 3). This is a summary of How Writing Came About (4).

6. John J. O'Conner and Edmund F. Robertson, "Babylonian Numerals," http://turnbull.dcs.st-and.ac.uk/history/HistTopics/Babylonian_numerals.html (School of Mathematics and Statistics, University of St. Andrews, Scotland, accessed 2003 Sep 13).

7. John J. O'Conner and Edmund F. Robertson, "Pythagoras's Theorem in Babylonian Mathematics," http://turnbull.dcs.st-and.ac.uk/history/HistTopics/Babylonian_Pythagoras.html (School of Mathematics and Statistics, University of St. Andrews, Scotland, accessed 2003 Sep 13).

8. John J. O'Conner and Edmund F. Robertson, "A History of Zero," http://turnbull.dcs.st-and.ac.uk/history/HistTopics/Zero.html (School of Mathematics and Statistics, University of St. Andrews, Scotland, accessed 2003 Sep 13).

9. John J. O'Conner and Edmund F. Robertson, "History Topics: Babylonian mathematics," http://turnbull.dcs.st-and.ac.uk/history/Indexes/Babylonians.html (School of Mathematics and Statistics, University of St. Andrews, Scotland, accessed 2003 Sep 13).