@misc{indiciae22f33bf83dc3,
  title = {Assessment of undiscovered oil and gas resources of the Powder River Basin Province of Wyoming and Montana— 2006 update},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2006},
  doi = {10.3133/fs20063135},
  url = {https://pubs.usgs.gov/publication/fs20063135},
  note = {Source identifier: fs20063135}
}