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  • Center for Watershed Protection. (6/25/2008) http://www.cwp.org/
  • Digest of Federal Resource Laws of Interest to the U.S. Fish and Wildlife Service. (6/24/2008) http://www.fws.gov/laws/lawsdigest/WATRSHD.HTML
  • Ecological Society of America. (6/25/2008)http://www.esa.org/science_resources/issues.php
  • Environmental Protection Agency. (6/18/2008)http://www.epa.gov
  • Haury, David L. "Studying Watersheds: A Confluence of Important Ideas." ERIC Clearinghouse for Science Mathematics and Environmental Education. December 2000. (6/23/2008) http://www.ericdigests.org/2003-1/ideas.htm
  • NatureServe. (6/24/2008)http://www.natureserve.org
  • Ohio Watershed Network. (6/18/2008) http://ohiowatersheds.osu.edu/index.html
  • United States Fish and Wildlife Servicehttp://www.fws.gov (6/18/2008)
  • United Nations International Rivers and Lakes Newsletter, June 2002.http://www.un.org/esa/sustdev/sdissues/water/rivers_lakes_news37.pdf (8/6/2008)
  • United States Geological Surveyhttp://www.usgs.gov (6/18/2008)
  • Water Resources Agency. (6/18/2008) http://www.wr.udel.edu/