@misc{indiciaecea4e8bd1b7e,
  title = {Proposed mining and reclamation plan, Pearl Mine, Big Horn County, Montana: Draft environmental statement},
  author = {U.S. Geological Survey and Montana Department of State Lands},
  year = {1979},
  doi = {10.3133/70265919},
  url = {https://pubs.usgs.gov/publication/70265919},
  note = {Source identifier: 70265919}
}