@misc{indiciae8983f3acb832,
  title = {Map showing principal coal beds of the Clearmont Quadrangle, Sheridan County, Powder River basin, Wyoming},
  author = {C. L. Molnia},
  year = {1988},
  doi = {10.3133/mf1991},
  url = {https://pubs.usgs.gov/publication/mf1991},
  note = {Source identifier: mf1991}
}