@misc{indiciae227b411beb78,
  title = {Economic and environmental evaluations of extractable coal resources conducted by the U. S. Geological Survey},
  author = {M.S. Ellis and T.J. Rohrbacher and M.D. Carter and C. L. Molnia and L. M. Osmonson and D.C. Scott},
  year = {2001},
  doi = {10.3133/fs10901},
  url = {https://pubs.usgs.gov/publication/fs10901},
  note = {Source identifier: fs10901}
}