@misc{indiciae0f22103c0035,
  title = {Water-resources data for deep aquifers of eastern Montana},
  author = {William B. Hopkins},
  year = {1980},
  doi = {10.3133/ofr80768},
  url = {https://pubs.usgs.gov/publication/ofr80768},
  note = {Source identifier: ofr80768}
}