TY  - RPRT
TI  - Nutrient Trends in Streams and Rivers of the United States, 1993-2003
AU  - Lori A. Sprague
AU  - David K. Mueller
AU  - Gregory E. Schwarz
AU  - David L. Lorenz
PY  - 2009
DO  - 10.3133/sir20085202
UR  - https://pubs.usgs.gov/publication/sir20085202
ID  - sir20085202
ER  -