@misc{indiciaee58462957358,
  title = {Surface Mine, West Interior Bituminous, Operations},
  author = {Skone, Timothy J.},
  year = {2011},
  doi = {10.2172/1509197},
  url = {https://www.osti.gov/biblio/1509197},
  note = {Source identifier: 1509197}
}