@misc{indiciaee7b8e0352c58,
  title = {Potentiometric-surface map of water in the Eagle Sandstone and equivalent units in the northern Great Plains area of Montana},
  author = {Gary W. Levings},
  year = {1982},
  doi = {10.3133/ofr82565},
  url = {https://pubs.usgs.gov/publication/ofr82565},
  note = {Source identifier: ofr82565}
}