@misc{indiciae4d7f016a6f25,
  title = {Geologic map and lignite deposits of the Dengate Quadrangle, Morton County, North Dakota},
  author = {C.S.V. Barclay},
  year = {1974},
  doi = {10.3133/coal67},
  url = {https://pubs.usgs.gov/publication/coal67},
  note = {Source identifier: coal67}
}