@misc{indiciae60d02688aaa8,
  title = {Key features of the National Water-Quality Assessment Program},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs05399},
  url = {https://pubs.usgs.gov/publication/fs05399},
  note = {Source identifier: fs05399}
}