@misc{indiciae239f813dabdd,
  title = {Uraniferous coal beds in parts of North Dakota, South Dakota, and Montana},
  author = {N.M. Denson and G.O. Bachman and H. D. Zeller and J. R. Gill and G. W. Moore and R.E. Melin},
  year = {1955},
  doi = {10.3133/coal33},
  url = {https://pubs.usgs.gov/publication/coal33},
  note = {Source identifier: coal33}
}