7Ira Brass,Frank Pelczarski,Holly Sage.Source Water Assessment and Protection Programs Show Initial Promise,But Obstacles Remain[EB/OL].http://www.epa.gov/oig/reports/2005/20050328-2005-P-00013.pdf,2005-03-28.20-32.
10Mary Ann Rozum,Susan McLoud,Jerry Blain.2003 National Source Water Protection Conference Draft Summary and Highlights[EB/OL].htttp://www.epa.gov/safewater/protect/swpconf.html,2003.1-3.
