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研究报告 [3]
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2016 [1]
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The Water-Quality Partnership for National Parks—U.S. Geological Survey and National Park Service, 1998–2016 [研究报告]
10.3133/fs20163041U.S. Geological Survey. 2016-01-01
Nilles, Mark A. manilles@usgs.gov;  Penoyer, Pete E;  Ludtke, Amy S. asludtke@usgs.gov;  Ellsworth, Alan C.
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Estimates of inorganic nitrogen wet deposition from precipitation for the conterminous United States, 1955-84 [研究报告]
10.3133/sir20145067U.S. Geological Survey. 2014-01-01
Gronberg, Jo Ann M.;  Ludtke, Amy S. asludtke@usgs.gov;  Knifong, Donna L. dknifong@usgs.gov
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Organic contaminants, trace and major elements, and nutrients in water and sediment sampled in response to the Deepwater Horizon oil spill [研究报告]
U.S. Geological Survey. 2012-01-01
Nowell, Lisa H. lhnowell@usgs.gov;  Ludtke, Amy S. asludtke@usgs.gov;  Mueller, David K. mueller@usgs.gov;  Scott, Jonathon C. jcscott@usgs.gov
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