TY  - RPRT
TI  - County-level estimates of nutrient inputs to the land surface of the conterminous United States, 1982-2001
AU  - Barbara C. Ruddy
AU  - David L. Lorenz
AU  - David K. Mueller
PY  - 2006
DO  - 10.3133/sir20065012
UR  - https://pubs.usgs.gov/publication/sir20065012
ID  - sir20065012
ER  -