@misc{indiciaea5bc79b6130e,
  title = {Phosphorus runoff risk assessment in karstic regions of the U.S.},
  author = {Andrew N. Sharpley and Phillip D. Hays and Michael B. Daniels and Karl W. VanDevender},
  year = {2020},
  doi = {10.1002/ael2.20001},
  url = {https://pubs.usgs.gov/publication/70208582},
  note = {Source identifier: 70208582}
}