@misc{indiciae0ec5a0633fad,
  title = {Preliminary geologic map and coal resources of the Holmes Ranch Quadrangle, Big Horn County, Montana},
  author = {Nancy E. Doelger and Juliana Waring Fahy},
  year = {1980},
  doi = {10.3133/ofr80212},
  url = {https://pubs.usgs.gov/publication/ofr80212},
  note = {Source identifier: ofr80212}
}