@misc{indiciaeca11ec9b8f6f,
  title = {Coal resource occurrence map, coal development potential map of the Marshall NW quadrangle, Dunn County, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78616},
  url = {https://pubs.usgs.gov/publication/ofr78616},
  note = {Source identifier: ofr78616}
}