@misc{indiciae18650dc55f9d,
  title = {Geology and strippable Federal coal resources in the south half of the Dunn Center lignite field, Dunn County, North Dakota},
  author = {Michael L. Menge},
  year = {1978},
  doi = {10.3133/ofr781027},
  url = {https://pubs.usgs.gov/publication/ofr781027},
  note = {Source identifier: ofr781027}
}