TY  - RPRT
TI  - Catchment-level estimates of nitrogen and phosphorus agricultural use from commercial fertilizer sales for the conterminous United States, 2012
AU  - Jana S. Stewart
AU  - Gregory E. Schwarz
AU  - John W. Brakebill
AU  - Stephen D. Preston
PY  - 2019
DO  - 10.3133/sir20185145
UR  - https://pubs.usgs.gov/publication/sir20185145
ID  - sir20185145
ER  -