@misc{indiciae16a399f76f02,
  title = {Evaluation of coal resources in the eastern part of the Fort Peck Indian Reservation, Montana},
  author = {Laura H. Biewick and J.K. Hardie and H.H. Amdt},
  year = {1990},
  doi = {10.3133/b1869},
  url = {https://pubs.usgs.gov/publication/b1869},
  note = {Source identifier: b1869}
}