@misc{indiciaebe4577f0d70e,
  title = {Coal resource occurrence map of the Saddle Butte SW Quadrangle, Dunn County, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78989},
  url = {https://pubs.usgs.gov/publication/ofr78989},
  note = {Source identifier: ofr78989}
}