@misc{indiciae66655123a0e5,
  title = {Strippable lignite deposits, Wibaux area, Montana and North Dakota},
  author = {Paul R. May},
  year = {1954},
  doi = {10.3133/b995g},
  url = {https://pubs.usgs.gov/publication/b995G},
  note = {Source identifier: b995G}
}