@misc{indiciae2036294b0d8e,
  title = {Coal resource occurrence map of the Coleharbor Quadrangle, McLean County, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78993},
  url = {https://pubs.usgs.gov/publication/ofr78993},
  note = {Source identifier: ofr78993}
}