@misc{indiciae257b6b890310,
  title = {Lignite in the Fort Berthold Indian Reservation, North Dakota, north of Missouri River},
  author = {M. A. Pishel},
  year = {1912},
  doi = {10.3133/b471c},
  url = {https://pubs.usgs.gov/publication/b471C},
  note = {Source identifier: b471C}
}