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Letter Report Assessing the USGS National Water Quality Assessment Program’s Science Framework ATTACHMENT A REFERENCES National Research Council (NRC). 2002. Opportunities to Improve the U.S. Geological Survey National Water Quality Assessment Program. Washington, D.C.: National Academies Press. National Research Council (NRC). 2009. Towards a Sustainable and Secure Water Future: A Leadership Role for the USGS. Washington, D.C.: National Academies Press. Service, R. F. 2004. As the west goes dry. Science 303(5661):1124-1127.