@misc{indiciae158ccfb426bb,
  title = {Coal resource occurrence map and coal development potential map of the Ziner Butte Quadrangle, Dunn County, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78615},
  url = {https://pubs.usgs.gov/publication/ofr78615},
  note = {Source identifier: ofr78615}
}