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Catchment-level estimates of nitrogen and phosphorus agricultural use from commercial fertilizer sales for the conterminous United States, 2012 [研究报告]
10.3133/sir20185145U.S. Geological Survey. 2019-01-01
Stewart, Jana S.;  Schwarz, Gregory E.;  Brakebill, John W.;  Preston, Stephen D.
Sources of fine-grained sediment in the Linganore Creek watershed, Frederick and Carroll Counties, Maryland, 2008-10 [研究报告]
10.3133/sir20145147U.S. Geological Survey. 2015-01-01
Gellis, Allen C.;  Noe, Gregory B.;  Clune, John W.;  Myers, Michael K.;  Hupp, Cliff R.;  Schenk, Edward R.;  Schwarz, Gregory E.
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Estimated nitrogen loads from selected tributaries in Connecticut draining to Long Island Sound, 1999???2009 [研究报告]
10.3133/sir20135171U.S. Geological Survey. 2013-01-01
Mullaney, John R.;  Schwarz, Gregory E.
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