@misc{indiciae6e94c016edbe,
  title = {Proposed plan of mining and reclamation, Big Sky Mine, Peabody Coal Company, coal lease M-15965, Colstrip, Montana: Final environmental statement: Volume 2},
  author = {U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/70265921},
  url = {https://pubs.usgs.gov/publication/70265921},
  note = {Source identifier: 70265921}
}