@misc{indiciae656cb276ae1a,
  title = {Montana ground-water quality},
  author = {R. F. Ferreira and M. R. Cannon and R. E. Davis and Federick Shewman and J.L. Arrigo},
  year = {1987},
  doi = {10.3133/ofr87736},
  url = {https://pubs.usgs.gov/publication/ofr87736},
  note = {Source identifier: ofr87736}
}