- Natural background concentrations of nutrients in streams and rivers of the conterminous United StatesRichard A Smith
U S Geological Survey, Reston, Virginia 20192, USA
Environ Sci Technol 37:3039-47. 2003..It is likely that background concentrations in some streams in these regions exceed proposed nutrient criteria...
- Differences in phosphorus and nitrogen delivery to the Gulf of Mexico from the Mississippi River BasinRichard B Alexander
National Water Quality Assessment Program, U S Geological Survey, 413 National Center, Reston, Virginia 20192, USA
Environ Sci Technol 42:822-30. 2008....
- Comment on "In-stream nitrogen attenuation: model-aggregation effects and implications for coastal nitrogen impacts"Richard B Alexander
Environ Sci Technol 40:2485-6; author reply 2487-8. 2006