@misc{indiciae32b83b203876,
  title = {Coal resource occurrence map of the Emmet SW quadrangle, Mercer and McLean Counties, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78990},
  url = {https://pubs.usgs.gov/publication/ofr78990},
  note = {Source identifier: ofr78990}
}