@misc{indiciae7ad9e6a4413d,
  title = {Coal resource occurrence map, coal development potential map of the Dunn Center NW quadrangle, Dunn County, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr781043},
  url = {https://pubs.usgs.gov/publication/ofr781043},
  note = {Source identifier: ofr781043}
}