@misc{indiciaec053dea83ee2,
  title = {Geologic map and coal resources of the Ranchester Quadrangle, Sheridan County, Wyoming, and Big Horn County, Montana},
  author = {Bruce E. Barnum},
  year = {1975},
  doi = {10.3133/coal75},
  url = {https://pubs.usgs.gov/publication/coal75},
  note = {Source identifier: coal75}
}