@misc{indiciae4179a0a8d09c,
  title = {Geologic and structure map of the south half of the Powder River and adjacent areas, northeastern Wyoming},
  author = {N.M. Denson and M.L. Gibson and G.L. Sims},
  year = {1992},
  doi = {10.3133/i2281b},
  url = {https://pubs.usgs.gov/publication/i2281B},
  note = {Source identifier: i2281B}
}