@misc{indiciae572809f0f75e,
  title = {Toxic substances hydrology program: Surface-water contamination},
  author = {Gail E. Mallard},
  year = {1989},
  doi = {10.3133/ofr89398},
  url = {https://pubs.usgs.gov/publication/ofr89398},
  note = {Source identifier: ofr89398}
}