Bibiliography

Grable, Lisa Leonor and Cleveland, April J.. "Water What Ifs Water Quality and Dissolved Oxygen." Science Junction. 1998. NC State University. Jan. 5 2005 <http://www.ncsu.edu/sciencejunction/depot/experiments/water/lessons/do/index.html

Kimball, John W.. "parts per million." Kimballs Biology pages. 1997. Harvard College. March 3, 2005 http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Ppm.html

Murphy, Lisa Denise. "Water Preasure and Flow Rate." University of Illinois. 1999. University of Illinois. March 4, 2005 <http://www.mste.uiuc.edu/users/Murphy/WaterTower/default.html>.