@misc{indiciae613b9db8fbca,
  title = {Preliminary report of 1976 lignite drilling in western North Dakota: Adams, Billings, Dunn, Hettinger, McKenzie, Mercer, Morton, Oliver, and Stark Counties},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/ofr77857},
  url = {https://pubs.usgs.gov/publication/ofr77857},
  note = {Source identifier: ofr77857}
}