@misc{indiciae64c069be67d4,
  title = {The New Salem lignite field, Morton County, North Dakota},
  author = {Eugene T. Hancock},
  year = {1921},
  doi = {10.3133/b726a},
  url = {https://pubs.usgs.gov/publication/b726A},
  note = {Source identifier: b726A}
}