@misc{indiciaec2f1774c6334,
  title = {Coal resource occurrence map and coal development potential map of the Schaffner Creek quadrangle, Dunn and Mercer Counties, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78996},
  url = {https://pubs.usgs.gov/publication/ofr78996},
  note = {Source identifier: ofr78996}
}