@misc{indiciae68a8ca29067a,
  title = {Geology of the northern part of the Girard coal field, Richland County, Montana},
  author = {George Edwards Prichard and Edwin R. Landis},
  year = {1955},
  doi = {10.3133/coal24},
  url = {https://pubs.usgs.gov/publication/coal24},
  note = {Source identifier: coal24}
}