Endnotes

     1Conray, John R., III,  “Spine,”  World Book Encyclopaedia.  2004 ed. 

     2Conray, John R., III,  “Spine,”  World Book Encyclopaedia.  2004 ed. 

     3  “Your Spine,”  27 Dec. 2006

    <http://www.bu.edu/lernet/GK12/tulay/Your_spine.pdf>.

     4 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

    <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     5 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     6 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     7 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     8 Conray, John R., III,  “Spine,”  World Book Encyclopaedia.  2004 ed.   

     9 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     10 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     11 Ansdorff, Dr. Marvin, “Mounting Research on Backpack Use,”  18 Dec. 2006 

     <http://www.annewilliams.com/advanced/media/nr_backpack_usage.pdf>.

     12 Minkel, JR.,  “A Parent’s Dream: Bungee-Powered Backpacks That Spare the Back,” 

     4 Jan. 2007  <http://www.sciam.com/article.cfm?chanID=sa003&articleID=A08D8A1

     E7F2-99DF-3018D53B664E78AA>.

     13 Minkel, JR.,  “A Parent’s Dream: Bungee-Powered Backpacks That Spare the Back,” 

     4 Jan. 2007  <http://www.sciam.com/article.cfm?chanID=sa003&articleID=A08D8A1

     E7F2-99DF-3018D53B664E78AA>.

     14 Minkel, JR.,  “A Parent’s Dream: Bungee-Powered Backpacks That Spare the Back,” 

     4 Jan. 2007  <http://www.sciam.com/article.cfm?chanID=sa003&articleID=A08D8A1

     E7F2-99DF-3018D53B664E78AA>.                                         

     15Minkel, JR.,  “A Parent’s Dream: Bungee-Powered Backpacks That Spare the Back,” 

     4 Jan. 2007  <http://www.sciam.com/article.cfm?chanID=sa003&articleID=A08D8A1E7F2-99DF-

    3018D53B664E78AA>.