@misc{indiciae30dfffb57028,
  title = {Geology and coal resources of the Lake De Smet area, Johnson County, Wyoming},
  author = {W. J. Mapel},
  year = {1954},
  doi = {10.3133/coal23},
  url = {https://pubs.usgs.gov/publication/coal23},
  note = {Source identifier: coal23}
}