@misc{indiciae44a5f128c975,
  title = {Evaluation of Nitrate Concentrations and Sources in the Elk Creek Watershed, Southwestern Ohio, 2003-2004},
  author = {Thomas L. Schumann and Bruce A. Pletsch},
  year = {2006},
  doi = {10.3133/sir20065223},
  url = {https://pubs.usgs.gov/publication/sir20065223},
  note = {Source identifier: sir20065223}
}