@misc{indiciaeab904d5da039,
  title = {Coal geology of the Bowman-Gascoyne area, Adams, Billings, Bowman, Golden Valley, and Slope Counties, North Dakota},
  author = {Robert C. Lewis},
  year = {1979},
  doi = {10.3133/ofr791698},
  url = {https://pubs.usgs.gov/publication/ofr791698},
  note = {Source identifier: ofr791698}
}