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Geochemical and mineralogical maps, with interpretation, for soils of the conterminous United States [研究报告]
10.3133/sir20175118U.S. Geological Survey. 2019-01-01
Smith, David B. dsmith@usgs.gov;  Solano, Federico fsolanoc@usgs.gov;  Woodruff, Laurel G. woodruff@usgs.gov;  Cannon, William F. wcannon@usgs.gov;  Ellefsen, Karl J. ellefsen@usgs.gov
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User’s guide for GcClust—An R package for clustering of regional geochemical data [研究报告]
10.3133/tm7C13U.S. Geological Survey. 2016-01-01
Ellefsen, Karl J. ellefsen@usgs.gov;  Smith, David B. dsmith@usgs.gov
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Effects of surface applications of biosolids on groundwater quality and trace-element concentrations in crops near Deer Trail, Colorado, 2004-2010 [研究报告]
U.S. Geological Survey. 2013-01-01
Yager, Tracy J.B.;  Crock, James G. jcrock@usgs.gov;  Smith, David B. dsmith@usgs.gov;  Furlong, Edward T. efurlong@usgs.gov;  Hageman, Philip L. phageman@usgs.gov;  Foreman, William T. wforeman@usgs.gov;  Gray, James L. jlgray@usgs.gov;  ReVello, Rhiannon C. rc
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