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U.S. Geological Survey
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Inland Waters
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1. National Atmospheric Deposition Program 2004 - Pennsylvania
2004. U.S. Geological Survey. The National Atmospheric Deposition Programational Trends Network (NADPTN) is a nationwide network of precipitation monitoring sites. The network i...
2. National Atmospheric Deposition Program 2005 - Pennsylvania
2005. U.S. Geological Survey. The National Atmospheric Deposition Programational Trends Network (NADPTN) is a nationwide network of precipitation monitoring sites. The network i...
3. Zebra Mussel Distribution: United States
2008. U.S. Geological Survey. The concern caused by the explosive spread of the zebra mussel, (Dreissena polymorpha), within the United States resulted in passage of the Nonindi...