@misc{indiciaec861f0ea9b5f,
  title = {Source-area characteristics of large public surface-water supplies in the conterminous United States an information resource for source-water assessment},
  author = {R. B. Alexander and R. A. Smith and M. J. Focazio and M.A. Horn},
  year = {1999},
  doi = {10.3133/fs16099},
  url = {https://pubs.usgs.gov/publication/fs16099},
  note = {Source identifier: fs16099}
}