@misc{indiciaec05ae62aeb86,
  title = {Assessment of coal geology, resources, and reserve base in the Powder River Basin, Wyoming and Montana},
  author = {David C. Scott and James A. Luppens},
  year = {2013},
  doi = {10.3133/fs20123143},
  url = {https://pubs.usgs.gov/publication/fs20123143},
  note = {Source identifier: fs20123143}
}