@misc{indiciae11afeb0f9caa,
  title = {Source-area characteristics of large public surface-water supplies in the conterminous United States : an information resource for source-water assessment},
  author = {Richard B. Alexander and Richard A. Smith and Michael J. Focazio and Marilee A. Horn},
  year = {1999},
  doi = {10.3133/ofr99248},
  url = {https://pubs.usgs.gov/publication/ofr99248},
  note = {Source identifier: ofr99248}
}