@misc{indiciae9b17ea1aec2b,
  title = {Coal resource occurrence map of the Marshall SE Quadrangle, Dunn and Stark counties, North Dakota},
  author = {Woodward-Clyde Consultants},
  year = {1978},
  doi = {10.3133/ofr78997},
  url = {https://pubs.usgs.gov/publication/ofr78997},
  note = {Source identifier: ofr78997}
}