@misc{indiciae942584a86b02,
  title = {Hydrogeologic data for selected coal areas, east-central Montana},
  author = {Robert S. Roberts},
  year = {1980},
  doi = {10.3133/ofr80329},
  url = {https://pubs.usgs.gov/publication/ofr80329},
  note = {Source identifier: ofr80329}
}