@misc{indiciaed7be4970f5ea, title = {Catchment-level estimates of nitrogen and phosphorus agricultural use from commercial fertilizer sales for the conterminous United States, 2012}, author = {Jana S. Stewart and Gregory E. Schwarz and John W. Brakebill and Stephen D. Preston}, year = {2019}, doi = {10.3133/sir20185145}, url = {https://pubs.usgs.gov/publication/sir20185145}, note = {Source identifier: sir20185145} }