@misc{indiciae810ec57b0f44,
  title = {An assessment of the economic potential of lignite and leonardite resources in the Williston Basin, North Dakota},
  author = {Brian N. Shaffer},
  year = {2021},
  doi = {10.3133/ofr20201135},
  url = {https://pubs.usgs.gov/publication/ofr20201135},
  note = {Source identifier: ofr20201135}
}