@misc{indiciaebab088f31368,
  title = {Rare earth elements in coal and coal fly ash},
  author = {Clint Scott and Allan Kolker},
  year = {2019},
  doi = {10.3133/fs20193048},
  url = {https://pubs.usgs.gov/publication/fs20193048},
  note = {Source identifier: fs20193048}
}