@misc{indiciaee42c97083dea,
  title = {Geologic and structure contour map of the Fort Peck Indian Reservation and vicinity, Montana},
  author = {A. F. Bateman},
  year = {1956},
  doi = {10.3133/i225},
  url = {https://pubs.usgs.gov/publication/i225},
  note = {Source identifier: i225}
}