@misc{indiciae680276a39c5d,
  title = {Contributions of Phosphorus from Groundwater to Streams in the Piedmont, Blue Ridge, and Valley and Ridge Physiographic Provinces, Eastern United States},
  author = {Judith M. Denver and Charles A. Cravotta and Scott W. Ator and Bruce D. Lindsey},
  year = {2011},
  doi = {10.3133/sir20105176},
  url = {https://pubs.usgs.gov/publication/sir20105176},
  note = {Source identifier: sir20105176}
}