@misc{indiciae0bea90248df2,
  title = {Potentiometric-surface map of water in the Lakota Formation and equivalent units in the northern Great Plains area of Montana},
  author = {Gary Wayne Levings},
  year = {1982},
  doi = {10.3133/ofr82563},
  url = {https://pubs.usgs.gov/publication/ofr82563},
  note = {Source identifier: ofr82563}
}