@misc{indiciae83699d407bc2,
  title = {Geologic map and coal sections of the Moorhead coal field, Montana, Big Horn, Rosebud, and Powder River counties, Montana},
  author = {R.P. Bryson and N. W. Bass},
  year = {1966},
  doi = {10.3133/ofr6611},
  url = {https://pubs.usgs.gov/publication/ofr6611},
  note = {Source identifier: ofr6611}
}