@misc{indiciaef47ed84c764c,
  title = {Preliminary report on 1975 drilling of lignite in western North Dakota: Adams, Bowman, Dunn, Hettinger, McLean, Mercer, Oliver, Slope, and William Counties},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/ofr76869},
  url = {https://pubs.usgs.gov/publication/ofr76869},
  note = {Source identifier: ofr76869}
}