@misc{indiciae0a75d3612f51,
  title = {Cross sections showing coal stratigraphy of the southwestern Powder River basin, Wyoming},
  author = {J.K. Hardie},
  year = {1991},
  doi = {10.3133/i1959c},
  url = {https://pubs.usgs.gov/publication/i1959C},
  note = {Source identifier: i1959C}
}