@misc{indiciaece26d0f50ca0,
  title = {Stratigraphic framework of coal beds in the Fort Union Formation, eastern part of the Fort Peck Indian Reservation, Daniels, Roosevelt, and Sheridan counties, Montana},
  author = {John K. Hardie and Harold H. Arndt},
  year = {1990},
  doi = {10.3133/coal122c},
  url = {https://pubs.usgs.gov/publication/coal122C},
  note = {Source identifier: coal122C}
}