@misc{indiciae74fd70ccc578,
  title = {Coal resources and Cenozoic geology of the Girard coal field, Richland County, Montana},
  author = {George Edwards Prichard and Edwin R. Landis},
  year = {1975},
  doi = {10.3133/b1310},
  url = {https://pubs.usgs.gov/publication/b1310},
  note = {Source identifier: b1310}
}